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Perera HCS, Ford B, Das G, Balembois F, Sathian J. Exploring light-emitting diode pumped luminescent concentrators in solid-state laser applications. Methods Appl Fluoresc 2024; 12:032001. [PMID: 38670142 DOI: 10.1088/2050-6120/ad444b] [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: 07/07/2023] [Accepted: 04/26/2024] [Indexed: 04/28/2024]
Abstract
In the past, there were limited efforts to use light-emitting diodes (LEDs) for pumping solid-state lasers. However, these attempts were overshadowed by the introduction of laser diodes, which offered more favourable pumping conditions. Nevertheless, recent advancements in high-power LEDs, coupled with the utilization of luminescent concentrators (LC), have paved the way for a novel approach to pump solid-state lasers. The combination of LEDs and LC in this LED-LC system presents several advantages, including enhanced ruggedness, stability, and cost-effectiveness compared to other laser pumping methods. This review explores the various techniques employed to pump solid-state lasers using LED-LC as a pump source, along with improvements made to enhance the brightness of LEDs in this context.
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Affiliation(s)
- H C S Perera
- Department of Physics, Khalifa University, Abu Dhabi, UAE
| | - B Ford
- Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle, United Kingdom
| | - G Das
- Department of Physics, Khalifa University, Abu Dhabi, UAE
| | - F Balembois
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France
| | - J Sathian
- Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle, United Kingdom
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Kawsihan A, Dissanayake DMSN, Rathuwadu NPW, Perera HCS, Dayananda KEDYT, Koswattage KR, Mahadeva R, Ganguly A, Das G, Mantilaka MMMGPG. Synthesis of an eco-inspired anticorrosive composite for mild steel applications. RSC Adv 2023; 13:28852-28860. [PMID: 37790100 PMCID: PMC10543880 DOI: 10.1039/d3ra02857g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 09/08/2023] [Indexed: 10/05/2023] Open
Abstract
We synthesised a polyaniline/mica (Mica-PANI) nanocomposite using naturally occurring muscovite mica by a top-down approach. The developed coating materials were characterised using a different technique to investigate their chemical and structural properties using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). Furthermore, the electrochemical properties of the coating materials were investigated by linear sweep voltammetry (LSV). SEM images elucidate the composite's average particle diameter of the prepared nano-mica, approximately 80 nm. The existence of relevant functional groups and bonding in the prepared Mica-PANI composite material was confirmed by means of XPS and FTIR techniques. Moreover, the synthesised composite with 5% w/w shows high anticorrosion protection, i.e. 84 μm per year, compared to competing materials, including commercial paint and individual raw materials (0.35 mm per year). The anti-corrosive effect occurs mainly due to two opposing effects: the formation of an Fe(OH)3 passive layer on the steel surface by oxidation of surface iron atoms by the PANI and the barrier effect of mica NPs through inhibition of corrosive agents. Therefore, the eco-inspired composite could be an ideal cost-effective coating material to prevent the corrosion of mild steel surfaces.
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Affiliation(s)
- Anoja Kawsihan
- Academy of Sri Lanka Institute of Nanotechnology, Nanotechnology and Science Park Mahenwatte, Pitipana Homagama Sri Lanka
- Sri Lanka Institute of Nanotechnology, Nanotechnology and Science Park Mahenwatte, Pitipana Homagama Sri Lanka
| | - D M S N Dissanayake
- Sri Lanka Institute of Nanotechnology, Nanotechnology and Science Park Mahenwatte, Pitipana Homagama Sri Lanka
| | - N P W Rathuwadu
- Institute for Combinatorial Advanced Research and Education, General Sir John Kotelawala Defence University Ratmalana Sri Lanka
| | - H C S Perera
- Department of Physics, Khalifa University United Arab Emirates
| | - K E D Y T Dayananda
- Institute of Materials Engineering and Technopreneurships (IMETECHNO) Kandy Sri Lanka
| | - K R Koswattage
- Department of Engineering Technology, Faculty of Technology, Sabaragamuwa University of Sri Lanka 70140 Belihuloya Sri Lanka
- Centre for Nanodevices Fabrication and Characterization (C. N. F. C.), Faculty of Technology, Sabaragamuwa University of Sri Lanka 70140 Belihuloya Sri Lanka
| | - Rajesh Mahadeva
- Department of Physics, Khalifa University United Arab Emirates
| | - Arnab Ganguly
- Department of Physics, Khalifa University United Arab Emirates
| | - G Das
- Department of Physics, Khalifa University United Arab Emirates
| | - M M M G P G Mantilaka
- Institute of Materials Engineering and Technopreneurships (IMETECHNO) Kandy Sri Lanka
- Centre for Nanodevices Fabrication and Characterization (C. N. F. C.), Faculty of Technology, Sabaragamuwa University of Sri Lanka 70140 Belihuloya Sri Lanka
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Agrawal V, Das G, Singla LD, Shukla S, Maharana BR, Jayraw AK, Shakya M, Jatav GP. Bovine cerebral theileriosis: first molecular report in cross bred cattle calf in India. J Parasit Dis 2023; 47:113-117. [PMID: 36910325 PMCID: PMC9998821 DOI: 10.1007/s12639-022-01544-9] [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: 08/10/2022] [Accepted: 10/20/2022] [Indexed: 11/05/2022] Open
Abstract
Bovine tropical theileriosis caused by Theileria annulata, is a serious constraint to Indian dairy industry with more fatal infections in exotic cattle and substantial losses to cross-bred and indigenous zebu cattle. The present communication is to place on record the first report of molecular based confirmed case of cerebral theileriosis caused by T. annulata coupled with its morphological detection, clinical manifestations, haematological alterations and therapeutic management in a cross bred cattle calf from India. After preparation of peripheral thin blood smear from cross bred cattle calf at the site of collection and fixation with methanol, blood sample brought to Department of Veterinary Parasitology, College of Veterinary Science and A.H, Jabalpur and stained by standard protocol for Giemsa staining. Genomic DNA was isolated from the collected blood sample using QIAamp® DNA blood mini kit following the manufacturer's recommendations and PCR was performed. The cross bred cow calf revealed high rise in temperature (105.5°F), increased heart rate, labored breathing with seromucous nasal discharge, enlargement of prescapular lymph node and animal exhibited tonic clonic convulsions in response to any sudden noise. Giemsa stained thin blood smear revealed intraerythrocytic piroplasm and Koch'sblue bodies of T. annulata within the cytoplasm of lymphocytes. The species of Theileria was confirmed by molecular amplification of genomic DNA as T. annulata.
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Affiliation(s)
- V. Agrawal
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Mhow, Indore, M.P. India
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
| | - G. Das
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Jabalpur, India
| | - L. D. Singla
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 India
| | - S. Shukla
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
- Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Mhow, Indore, India
| | - B. R. Maharana
- Referral Veterinary Diagnostic and Extension Centre (RVDEC), Lala Lajpat Rai University of Veterinary and Animal Sciences (LUVAS), Uchani, Karnal, Haryana India
| | - A. K. Jayraw
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Mhow, Indore, M.P. India
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
| | - M. Shakya
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Mhow, Indore, M.P. India
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
| | - G. P. Jatav
- Nanaji Deshmukh Veterinary Science University, Jabalpur, M.P. India
- Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Mhow, Indore, India
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Das G, Das S, Talukdar AD, Venil CK, Bose S, Banerjee S, Shin HS, Gutiérrez-Grijalva EP, Heredia JB, Patra JK. Pharmacology and Ethnomedicinal Potential of Selected Plants Species from Apiaceae (Umbelliferae). Comb Chem High Throughput Screen 2023; 26:256-288. [PMID: 35388749 DOI: 10.2174/1386207325666220406110404] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/06/2021] [Accepted: 12/14/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The Apiaceae or Umbelliferae is one of the largest families in terms of species representation in the plant kingdom. It is also a prominent family in the field of phytochemicals and pharmacology. The family is also quite prominent in the production of spices and condiments and food supplements in nutrition, aside from the potential of species in the family to induce apoptotic, antimicrobial, antitumor, and hepatoprotective activities. OBJECTIVE This work presents a detailed structural elucidation and functional aspects of phytochemicals from the Apiaceae or Umbelliferae family. METHODS Furthermore, the application of members of this family in traditional and modern pharmacology is emphasized. This review also highlights the linkage of phytochemicals used in the conventional system of medication for the development of novel therapeutics through a chain of pre-clinical and clinical trials. CONCLUSION This study may represent a valuable step ahead in the clinical development of natural drugs for curing several ailments, including respiratory and virus-related diseases.
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Affiliation(s)
- G Das
- Research Institute of Integrative Life Sciences, Dongguk University-Seoul, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - S Das
- Department of Life Science & Bioinformatics, Assam University, Silchar-11, India
| | - A D Talukdar
- Department of Life Science & Bioinformatics, Assam University, Silchar-11, India
| | - C K Venil
- Department of Biotechnology, Anna University, Regional Campus - Coimbatore, Coimbatore, 641046, Tamil Nadu, India
| | - S Bose
- Department of Pharmacy, Sanaka Educational Trust's Group of Institutions, Durgapur, 713212, West Bengal, India
| | - S Banerjee
- Gupta College of Technological Sciences, G.T. Road, Ashram More, West Bengal, 713301, India
| | - H-S Shin
- Department of Food Science & Biotechnology, Dongguk University-Seoul, Goyangsi 10326, Republic of Korea
| | - E P Gutiérrez-Grijalva
- Cátedras CONACYT-Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a Eldorado, Col. Campo el Diez, Culiacán CP 80110, Sinaloa, México
| | - J B Heredia
- Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a Eldorado, Col. Campo el Diez, Culiacán CP 80110, Sinaloa, México
| | - J K Patra
- Research Institute of Integrative Life Sciences, Dongguk University-Seoul, Goyang-si, Gyeonggi-do 10326, Republic of Korea
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Bista A, Singh H, Unnithan A, Das G, Kesawarini D, Bristoll S, Lewis N, Alnoori N. 350 New Service of Intravenous Antibiotics Administration at Home- a Single Centre Experience. Br J Surg 2022. [DOI: 10.1093/bjs/znac039.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Introduction
Outpatient Parenteral Antibiotics Therapy (OPAT) provides a safe and effective alternative to prevent a long-term hospital stay. If used efficiently, it is beneficial and cost-effective.
Method
199 patients from January 2017 since the services started to March 2021 were included in this retrospective observational study. Demographics, clinical management and OPAT outcome data were studied and compared with local guidelines. Patients receiving services for oral medications or ambulant to reach AECU were excluded.
Results
205 patients received the service with a total of 248 patient episodes. 6 patients were excluded because of inadequate data availability. 199 cases were analysed with a mean age of 72±13.9 years (age ≥60 years: 79.8%; M:F 3:2). 24.6% cases were osteomyelitis followed by 12% prosthetic infections. The average duration of antibiotics received was 38.4 days (3–187 days). We assumed 3 days as a benchmark for duration deviated from the planned duration and found 45% of patients got more antibiotics than they were planned: with an average of 20 days excess. 65.8% of patients had microbiological investigations done before antibiotics. Flucloxacillin was the first-choice antibiotic. When compared to the trust guidelines, 29% of patients were managed in line with the recommended duration, proper investigations, and choice of antibiotics. 14.5% of patients developed side effects.
Conclusions
With this being a new service, there are a lot of opportunities to improve monitoring, patient experience and safe clinical practice. We have already started the improvement by changing our record-keeping for clinical governance and are working on the clinical pathway.
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Affiliation(s)
- A. Bista
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - H. Singh
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - A. Unnithan
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - G. Das
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - D. Kesawarini
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - S. Bristoll
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - N. Lewis
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
| | - N. Alnoori
- Ashford and St Peter's Hospitals NHS Foundations Trust, Chertsey, United Kingdom
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Barve D, Dave P, Gulve M, Saquib S, Das G, Sibghatullah M, Chaturvedi S. Assessment of microhardness and color stability of micro-hybrid and nano-filled composite resins. Niger J Clin Pract 2021; 24:1499-1505. [PMID: 34657016 DOI: 10.4103/njcp.njcp_632_20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background and Aims Composite resins are among the most popular restorative dental materials because of the strength and esthetic properties. The goal of this study was to assess the effect of commonly consumed beverages on microhardness and color stability of microhybrid (MH) and nanofilled NF) composite resins. Material and Methods 240 samples were prepared from the composite material [MH = 120 (material I) and NF = 120 (material II)] and allocated into eight groups of 30 samples. In each group, half of the samples were tested for microhardness and another-half for color stability. After baseline measurements, the samples were immersed in test media, that is, distilled water and beverages (tea, cola, and coffee) for 15 days. Microhardness and color stability measurements were carried out after 15 days to assess the effect of beverages. The color stability and microhardness values were compared and evaluated by analysis of variance (ANOVA) using Tukey's alteration test. Results It was reported that the microhardness decreased for both the materials after immersion in all the beverages. Percentage change in microhardness was considerably higher in material II in comparison to the material I in cola drink. Color change was significantly higher in material II compared to material I in water and coffee. Cola drink caused the maximum change in microhardness among all the beverages and coffee caused the maximum color change among all the beverages. Conclusion Both composite materials (I and II) showed a reduction in microhardness and change in color after immersion in a different type of test media.
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Affiliation(s)
- D Barve
- Departments of Conservative Dentistry and Endodontics. SMBT Institute of Dental Sciences, Nasik, Maharashtra, India
| | - P Dave
- Department of Pediatric Dentistry, SMBT Institute of Dental Sciences, Dhamangaon Nandi Hills, Nasik, Maharashtra, India
| | - M Gulve
- Department of Conservative Dentistry & Endodontics, MGV KBH Dental College and Hospital, Panchavati, Nasik, Maharashtra, India
| | - S Saquib
- Department of Periodontics and Community Dental Sciences, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - G Das
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - M Sibghatullah
- Restorative Dentistry, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - S Chaturvedi
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia
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Das G, Hajra DK, Mukherjee RD, Hembram S, Roy B. Sustainable income generation of the farmers through pig farming: A case study in Terai region of West Bengal. Journal of Livestock Science 2021. [DOI: 10.33259/jlivestsci.2021.241-245] [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: 11/11/2022]
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Affiliation(s)
- G J Hoilat
- Address correspondence to: G. J. Hoilat, Department of Medicine, State University of New York Upstate Medical University, Syracuse, NY, USA.
| | - G Das
- Department of Nephrology, USA
| | | | - P Shanley
- Department of Pathology, State University of New York Upstate Medical University, Syracuse, NY, USA
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Shaikh AH, Ahmed S, Ahmed AR, Das G, Taqi M, Nisar S, Khan O. Assessment of radiographic morphology of mandibular condyles: a radiographic study. Folia Morphol (Warsz) 2021; 81:481-486. [PMID: 34018177 DOI: 10.5603/fm.a2021.0049] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/03/2021] [Accepted: 05/04/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Panoramic radiographs are the most common radiographic tool used by the dental clinicians to evaluate teeth, mandible and other related structures of the jaws. Mandibular condyle is an important anatomical landmark for facial growth, expressed in an upward and backward direction. The presentation of mandibular condyle differs widely among different group of ages and individuals. MATERIALS AND METHODS The retrospective cross-sectional study was conducted from Nov 2018 to March 2019 at Dow International Dental College (DIDC) Karachi that includes radiographic evaluation of 500 mandibular condyles. All retrievable OPGs were obtained and data were extracted regarding age, gender and condylar morphology. RESULTS The morphological appearances of mandibular condyle have great variation among different age groups and subjects. Normally we recognize five basic shapes i.e. Oval, Bird beak, crooked finger, diamond and mixed. Out of 250 pair of condylar heads that were evaluated, 50% were oval, 40% bird beak, 4.8% crooked finger and diamond 4.8%. CONCLUSIONS All four morphological types of mandibular condyles were observed and the oval shape condyles were most prevalent among both genders and all age groups. In future studies, the inclusion of other parameters and large sample size may provide unique information.
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Affiliation(s)
- A H Shaikh
- Dow International Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | - S Ahmed
- Dow International Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | - A R Ahmed
- College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - G Das
- College of Dentistry, King Khalid University, Abha, Saudi Arabia.
| | - M Taqi
- Dow Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | - S Nisar
- DrIshratulebad Khan Institute of Oral and Health Sciences, Dow University of Health Sciences, Karachi, Pakistan
| | - O Khan
- DrIshratulebad Khan Institute of Oral and Health Sciences, Dow University of Health Sciences, Karachi, Pakistan
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Abstract
This study assessed the efficacy of closantel vis-à-vis herbal extracts with known anti-parasitic properties, against fenbendazole-resistant nematodes in goats maintained under a semi-intensive system of management at the University goat farm, Jabalpur. Fifty goats were randomly assigned to five groups, each comprising 10 animals, irrespective of their breed, age and sex. Each animal in Group I, II and III was orally administered with aqueous leaf extracts of neem (Azadirachta indica) at 1 g/kg body weight, sitaphal (Annona squamosa) at 1.5 g/kg body weight and tobacco (Nicotiana tabacum) at 1 g/kg body weight, respectively, whereas Group IV was an untreated control group. Each animal in Group V was orally treated with closantel at 10 mg/kg body weight. During the course of the study, all animals were maintained under an identical semi-intensive system of management. Compared to the untreated control group (Group IV), there was no conspicuous reduction in post-treatment (day 10) faecal egg counts (FEC) in animals administered with the herbal extracts (Groups I, II and III), which is suggestive of poor anti-parasitic activity. However, using the faecal egg count reduction test (FECRT), the overall efficacy of closantel was recorded as 95.64%. This supports the rotational use of closantel as a preferred choice over the benzimidazole group of anthelmintics and/or herbal extracts to meet the acute challenge of in situ development of drug-resistant gastrointestinal nematodes, especially Haemonchus contortus.
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Affiliation(s)
- A K Dixit
- Department of Veterinary Parasitology,College of Veterinary Science & Animal Husbandry,Nanaji Deshmukh Veterinary Science University,Jabalpur 482001,Madhya Pradesh,India
| | - G Das
- Department of Veterinary Parasitology,College of Veterinary Science & Animal Husbandry,Nanaji Deshmukh Veterinary Science University,Jabalpur 482001,Madhya Pradesh,India
| | - P Dixit
- Department of Veterinary Medicine,College of Veterinary Science & Animal Husbandry,Nanaji Deshmukh Veterinary Science University,Jabalpur 482001,Madhya Pradesh,India
| | - R L Sharma
- 843-44,Ranisati Nagar,P.O. Shyam Nagar,Ajmer Road,Jaipur-302019,Rajasthan,India
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Das S, Srinivasan S, Srivastava A, Kumar S, Das G, Das S, Gupta A, Nayak C, Purwar R. 879 IL-9 mediated human primary keratinocytes invasion is dependent on MLC controlled contractility and independent of MMP activity. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.890] [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: 10/17/2022]
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Srinivasan S, Das S, Srivastava A, Kumar S, Das G, Das S, Gupta A, Nayak C, Purwar R. 869 IL-17 promotes human primary keratinocyte invasion potential by controlling cell mechanics: A novel MMP-independent mechanobiology pathway. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.880] [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]
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Dixit AK, Das G, Dixit P, Singh AP, Kumbhakar NK, Sankar M, Sharma RL. An assessment of benzimidazole resistance against caprine nematodes in Central India. Trop Anim Health Prod 2017; 49:1471-1478. [PMID: 28717849 DOI: 10.1007/s11250-017-1349-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 07/03/2017] [Indexed: 11/26/2022]
Abstract
Current status of resistance to benzimidazole (BZ) group of anthelmintic drugs against caprine nematodes in Central India at Amanala goat farm, Jabalpur, Madhya Pradesh (M. P.), was systematically investigated using faecal egg count reduction (FECR) test and egg hatch test (EHT). Besides, allele-specific PCR (AS-PCR) was deployed to ascertain the susceptible genotype (alleles) especially of the Haemonchus contortus. Randomly selected 30 goats, irrespective of age and sex, were divided into three groups of 10 each, to serve as treated and untreated controls. It was ensured that the animals were not administered with an anthelmintic drug for the past 3 months prior to undertaking the study, and faecal egg counts were estimated. FECR test evidenced fenbendazole resistance by partial elimination (24.90%) copro-egg counts in the treated group of animals vis-à-vis controls with a lower confidence interval of -26%. Further, EHT revealed ED-50 value of 0.335 μg of thiabendazole/ml, confirming benzimidazole resistance in the animals of that farm. AS-PCR showed that 62% of H. contortus larvae were homozygous resistant (rr), 24% heterozygous (rS) and 14% homozygous susceptible (SS). The genotypic frequencies of three genotypes (rr, rS and SS) were significantly (P < 0.01) different. The prevalence of benzimidazole resistance allele (r) was also significantly (P < 0.01) higher (74%) as compared to susceptible allele (S) (26%). The resistance to benzimidazole has been discussed while emphasizing improved managemental practices designed to reduce exposure of the goat population to parasites, minimize frequency of anthelmintic use at optimum dose and rotational use of different chemical groups of medicines with different mode of action, so as to overcome and combat the upcoming problem in the field.
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Affiliation(s)
- A K Dixit
- Department of Veterinary Parasitology, College of Veterinary Science & Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh, 482001, India.
| | - G Das
- Department of Veterinary Parasitology, College of Veterinary Science & Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh, 482001, India
| | - Pooja Dixit
- Department of Veterinary Medicine, College of Veterinary Science & Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh, 482001, India
| | - A P Singh
- Animal Biotechnology Centre, Nanaji Deshmukh Veterinary Science University, Adhartal, Jabalpur, Madhya Pradesh, 482004, India
| | - N K Kumbhakar
- Department of Veterinary Parasitology, College of Veterinary Science & Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh, 482001, India
| | - M Sankar
- Temperate Animal Husbandry, Indian Veterinary Research Institute, Mukteswar, Uttarakhand, India
| | - R L Sharma
- , 833/44, Ranisati Nagar, P.O. Shyam Nagar, Ajmer Road, Jaipur, Rajasthan, 302019, India
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Marini M, Limongi T, Falqui A, Genovese A, Allione M, Moretti M, Lopatin S, Tirinato L, Das G, Torre B, Giugni A, Cesca F, Benfenati F, Di Fabrizio E. Imaging and structural studies of DNA-protein complexes and membrane ion channels. Nanoscale 2017; 9:2768-2777. [PMID: 28155926 DOI: 10.1039/c6nr07958j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In bio-imaging by electron microscopy, damage of the sample and limited contrast are the two main hurdles for reaching high image quality. We extend a new preparation method based on nanofabrication and super-hydrophobicity to the imaging and structural studies of nucleic acids, nucleic acid-protein complexes (DNA/Rad51 repair protein complex) and neuronal ion channels (gap-junction, K+ and GABAA channels) as paradigms of biological significance and increasing complexity. The preparation method is based on the liquid phase and is compatible with physiological conditions. Only in the very last stage, samples are dried for TEM analysis. Conventional TEM and high-resolution TEM (HRTEM) were used to achieve a resolution of 3.3 and 1.5 Å, respectively. The EM dataset quality allows the determination of relevant structural and metrological information on the DNA structure, DNA-protein interactions and ion channels, allowing the identification of specific macromolecules and their structure.
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Affiliation(s)
- M Marini
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - T Limongi
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - A Falqui
- King Abdullah University of Science and Technology, NABLA lab, BESE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - A Genovese
- King Abdullah University of Science and Technology, NABLA lab, BESE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - M Allione
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - M Moretti
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - S Lopatin
- King Abdullah University of Science and Technology, Imaging and Characterization core lab, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - L Tirinato
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - G Das
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - B Torre
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - A Giugni
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
| | - F Cesca
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy
| | - F Benfenati
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy
| | - E Di Fabrizio
- King Abdullah University of Science and Technology, SMILEs lab, PSE and BESE Divisions, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
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Katuri RN, Das G, Singh AK, Chalhotra SK, Nath S. Comparative efficacy of deltamethrin and chlorpyriphos in bovine ticks in and around Jabalpur. J Parasit Dis 2016; 41:713-715. [PMID: 28848265 DOI: 10.1007/s12639-016-0872-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 12/15/2016] [Indexed: 11/26/2022] Open
Abstract
Efficacy of chlorpyriphos (Classic*20, 20% EC) and deltamethrin (Butox®, 1.25% EC) was assessed by spraying these drugs on cattle and buffaloes which were naturally infested with ticks at the concentration of 2.5 and 2 ml/l, respectively. Results of the study demonstrated the prolonged effect of chlorpyriphos when compared with deltamethrin. Moreover, residual effect of chlorpyriphos remained even after 14 days of treatment with 28.57% animals showing reinfestation, while in deltamethrin treated animals; the tick number started increasing after 14th day of treatment with 50% animals showing reinfestation on 14th day post-treatment.
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Affiliation(s)
- R N Katuri
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - G Das
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - A K Singh
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - S K Chalhotra
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - S Nath
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
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Trevisanutto JO, Linhananta A, Das G. Plasmonic structure: fiber grating formed by gold nanorods on a tapered fiber. Opt Lett 2016; 41:5789-5792. [PMID: 27973503 DOI: 10.1364/ol.41.005789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The authors demonstrated the fabrication of a fiber Bragg grating-like plasmonic nanostructure on the surface of a tapered optical fiber using gold nanorods (GNRs). A multimode optical fiber with core and cladding diameters of 105 and 125 μm, respectively, was used to make a tapered fiber using a dynamic etching process. The tip diameter was ∼100 nm. Light from a laser was coupled to the untapered end of the fiber, which produced a strong evanescent field around the tapered section of the fiber. The gradient force due to the evanescent field trapped the GNRs on the surface of the tapered fiber. The authors explored possible causes of the GNR distribution. The plasmonic structure will be a good candidate for sensing based on surface enhanced Raman scattering.
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Affiliation(s)
- S Koley
- Department of Dermatology, North Bengal Medical College, Darjeeling, West Bengal, India
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Koovapra S, Bandyopadhyay S, Das G, Bhattacharyya D, Banerjee J, Mahanti A, Samanta I, Nanda PK, Kumar A, Mukherjee R, Dimri U, Singh RK. Molecular signature of extended spectrum β-lactamase producing Klebsiella pneumoniae isolated from bovine milk in eastern and north-eastern India. Infect Genet Evol 2016; 44:395-402. [PMID: 27473782 DOI: 10.1016/j.meegid.2016.07.032] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [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: 03/23/2016] [Revised: 07/22/2016] [Accepted: 07/24/2016] [Indexed: 11/16/2022]
Abstract
The present study reports on 23 extended spectrum β-lactamase producing Klebsiella pneumoniae (KP), isolated from milk samples (n=340) of healthy cows (n=129) and cows with subclinical (n=159) and clinical (n=52) mastitis, from three different states of India viz. West Bengal, Jharkhand and Mizoram. Seven of them were AmpC type β-lactamase producers, as well. The ESBL producing KP were significantly (P=0.006, χ2=10.04, df=2) and more frequently detected in milk samples of mastitic cows than healthy ones. The β-lactamase genes - blaCTX-M, blaTEM and blaSHV were detected in 19, 8 and 3 isolates, respectively. In all but one CTX-M positive isolates, the genetic platform - ISEcp1-blaCTX-M-orf477 was detected. Ten of the isolates carried plasmid mediated quinolone resistance gene - qnrS and 1 isolate possessed qnrB. Again 11 of them were found to have sulfonamide resistance gene - sul1 and 12 possessed class I integron. Sequencing of the class 1 integron revealed the presence of dfrA12/dfrA17 and aadA2/aadA5 gene cassettes conferring resistance to trimethoprim and aminoglycosides, respectively. All the isolates, characterized by enterobacterial repetitive intergenic consensus (ERIC) PCR, yielded distinct fingerprinting profile. However, most of the isolates from Jharkhand were clustered along with two isolates each from West Bengal and Mizoram indicating their clonal relatedness even though isolated from geographically different areas. Isolation of ESBL producing KP from bovine milk samples implies its public health significance; as such pathogens may enter the human food chain causing severe health hazards.
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Affiliation(s)
- S Koovapra
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - S Bandyopadhyay
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India.
| | - G Das
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - D Bhattacharyya
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - J Banerjee
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - A Mahanti
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - I Samanta
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - P K Nanda
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - A Kumar
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - R Mukherjee
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - U Dimri
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
| | - R K Singh
- ICAR-Indian Veterinary Research Institute, Eastern Regional Station, 37 Belgachia Road, Kolkata 700 037, India
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Das G, Tan B, Nicholls K. Safety and efficacy of a novel short occlusive regimen of imiquimod for selected non-melanotic skin lesions in renal transplant patients. Intern Med J 2016; 46:352-5. [DOI: 10.1111/imj.13004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 12/29/2015] [Accepted: 01/04/2016] [Indexed: 12/17/2022]
Affiliation(s)
- G. Das
- Department of Nephrology; The Royal Melbourne Hospital; Melbourne Victoria Australia
| | - B. Tan
- Department of Dermatology; The Royal Melbourne Hospital; Melbourne Victoria Australia
| | - K. Nicholls
- Department of Nephrology; The Royal Melbourne Hospital; Melbourne Victoria Australia
- Department of Medicine; Royal Melbourne Hospital, The University of Melbourne; Melbourne Victoria Australia
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Greally M, Kielty J, Das G, Malouf C, O'Riordan L, Coleman N, Quinn C, McDermott E, Gullo G, Kelly C, Crown J, Prichard R, Walshe J. Abstract P1-07-09: Retrospective cohort study of patients (pts) diagnosed with breast cancer (BC) <40 yrs: 2000 to 2015⟨. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-07-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Young women (<40 yrs) with breast cancer (YWBC) account for 7-12% of BC diagnoses. BC is the leading cause of cancer death in this group (G). Age-specific data on outcome and appropriate treatment (Rx) are lacking. YWBC appear to have more biologically aggressive subtypes and a higher risk of relapse and death. We studied the clinico-pathological (ClinPath) characteristics in YWBC, examining how outcomes/Rx have evolved.
Methods
YWBC were identified from pathology databases at 2 tertiary centers. Pts were divided into 2 cohorts: BC diagnoses from 2000-2007 (G1) and 2008-2015 (G2). ClinPath and Rx data were retrieved from clinical, radiology and histology databases. Statistical analysis was performed using SPSS.
Results
We identified 347 pts. Tumor features are shown in Table I. Median age is 36 (23-39). By histology, 90.8% (n=315) had invasive ductal carcinoma, 53.1% (n=181) had Grade III BC and 56.3% (n=171) had lymphovascular invasion. Pregnancy-associated BC occurred in 10.7% (n=34). Mastectomy (MX) was performed in 53% (n=176) and axillary lymph node clearance (ALNC) in 63.8% (n=192 [G1: 84.3% vs. G2: 48.6%, p<0.001]).
Table 1Tumor features Group 1 (n=149)Group 2 (n=198)Total (n=347)p-valueMedian tumor size (mm) 252222.5p=0.115Node positivity 88 (60.3%)100(51.5%)188 (55.3%)p=0.109Median node count 4 (1-44)1 (1-30)2 (1-44)p<0.001StageI 99(29%) II 148 (43.3%) III 70 (20.5%) IV 23(7.3%) Biomarker status*ER+/HER2-76 (53.1%)120 (60.6%)196 (56%)p=0.086 HER2+41 (28.7%)45 (22.8%)86 (27%)p=0.031 Triple negative (TN)26 (18.2%)33 (16.8%)59 (17%)p=0.291* Missing data n=6
Rx characteristics are shown in Table 2. 85 pts received neo-adjuvant therapy (NAT); 48.3% (n=41) ER+/HER2-, 27% (n=23) HER2+ and 24.7% (n=21) TNBC. Pts receiving NAT in G2 trended towards improved pCR rate (G2: 24.6% vs G1: 8.3%, p=0.057). Endocrine Rx alone was received by 9.8% (n=22); 13.6% (n=18) in G2 vs 4.3% (n=4) in G1. OncotypeDx(ODx) was used in 23 pts (14.9%) (median score 17), 1 had a DR (ODx Score = 18).
Table 2Tx characteristics n=347 Chemotherapy Total300(86.4%) NAT85 (28.3%)Pathological Complete Response (pCR)* pCR (n=16, 19.8%)No pCR (n=65, 80.2%) ER+/HER2-18.8%(n=3)53.9% (n=35) HER2+/ER+18.8%(n=3)13.8% (n=9) HER2+/ER-31.2% (n=5)9.2% (n=6) TNBC31.2%(n=5)23.1%(n=15)Local relapse 1 (6.2%)1(1.5%)Distant relapse (DR) 022(33.8%)*Data incomplete n=4
DR occurred in 50 pts (16%), including 13 (20.3%) HER2+ pts. Of note, 92.3% (n=12) of these were in G1. Relapse rates (RR) in TN and ER+/HER- pts were 19.6% (n=11) and 13.7% (n=26) respectively. There was a higher RR in G1 (34.8% vs 11.4%, p<0.001). Overall survival in pts with stage IV dx was 32 mos in G1 and 48 mos in G2.
Conclusion
In line with existing data, locally advanced dx is more prevalent in YWBC. MX and ALNC rates were high and most received multimodal Rx. The extent of axillary surgery declined. Pts in G2 had lower volume BC at diagnosis suggesting increasing awareness. TN and HER2+ subtypes accounted for a slightly higher proportion of BC cases. Pts with PCR had better outcomes. Only 16% relapsed with metastatic dx. The impact of HER2 Rx is highlighted by reduced RR in HER2+ G2 pts. Outcomes were unchanged in pts with ER+/HER2- and TNBC. These remain a priority for future research.
Citation Format: Greally M, Kielty J, Das G, Malouf C, O'Riordan L, Coleman N, Quinn C, McDermott E, Gullo G, Kelly C, Crown J, Prichard R, Walshe J. Retrospective cohort study of patients (pts) diagnosed with breast cancer (BC) <40 yrs: 2000 to 2015⟨. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-07-09.
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Affiliation(s)
- M Greally
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - J Kielty
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - G Das
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - C Malouf
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - L O'Riordan
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - N Coleman
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - C Quinn
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - E McDermott
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - G Gullo
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - C Kelly
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - J Crown
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - R Prichard
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
| | - J Walshe
- St. Vincent's University & Private Hospitals, Dublin, Ireland; Mater Misercordiae University Hospital, Dublin, Ireland
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Mandal S, Das G. Gas phase conformational behavior of selenomethionine: A computational elucidation. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476615070021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ghimire M, Pahari B, Das G, Das GC. Prevalence of Peripheral Arterial Disease (PAD) in End Stage Renal Disease (ESRD) Patients on Hemodialysis: A Study from Central Nepal. ACTA ACUST UNITED AC 2015; 12:181-4. [DOI: 10.3126/kumj.v12i3.13714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Peripheral arterial disease is a common condition in the hemodialysis population with an estimated prevalence ranging from 17-48%. Many studies have been conducted to know the prevalence of peripheral vascular disease in hemodialysis population. However no such study has been conducted so far in Nepal.Objective This study was carried out with an objective to assess the prevalence of Peripheral Arterial Disease in End Stage Renal Disease Patients on Hemodialysis.Method Fifty patients with a diagnosis of End Stage Renal Disease (irrespective of the underlying cause), and those who were on hemodialytic support for more than 3 months were studied over a period of one year. Peripheral arterial disease was diagnosed on the basis of the ankle –brachial index, which was the ratio of the resting systolic blood pressure in the arteries of the ankle to that of the brachial artery, measured by using a standard mercury manometer with a cuff of appropriate size and the Doppler ultrasound. Patients with ankle –brachial index ?0.9 were considered positive for peripheral arterial disease.Result A total of 50 End Stage Renal Disease patients were analyzed. The mean age of the patient was 49.81±12.63 years. The age range was from 18- 79 years. Majority of them were males 64% (n=32). Peripheral arterial disease defined by ankle –brachial index ?0.9 was present in 30% (n=15) of patients. The three major cause of End Stage Renal Disease in the study population was Chronic Glomerulonephritis 40 % (n=20), Type 2 Diabetes Mellitus 28 % (n=14) and Hypertension 24 % (n=12). Type 2 Diabetes Mellitus was the commonest cause 53% (n=8) of End Stage Renal Disease in patients with peripheral arterial disease followed by hypertension 33% (n=5). On univariate analysis, peripheral arterial disease was found to be significantly associated with age >40 years (p value= 0.003; OR=14.8; CI=1.75-125.27), Type 2 Diabetes Mellitus (p value= 0.009; OR=5.4; CI=1.44-21.14), parasthesia of lower limbs (p value= 0.001; OR=10; CI-2.31-43.16), and intact PTH >300 ng/ml (p value =0.006; OR=5.7; CI=1.55-21.50). However on multivariate analysis only parasthesia of lower limbs and intact PTH >300 ng/ml were significantly and independently associated with peripheral arterial disease, while other variables were not significant.Conclusion Peripheral arterial disease was common occurrence in End Stage Renal Disease patients on hemodialysis. Ankle –brachial index needs to be included as a routine assessment in End Stage Renal Disease patients to detect peripheral arterial disease at its earliest.Kathmandu University Medical Journal Vol.12(3) 2014; 181-184
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Bhattacharya N, Mukherjee H, Naskar R, Talukdar S, Das G, Pramanik N, Hati AK. Serological diagnosis of dengue in laboratory practice in Kolkata. Indian J Med Microbiol 2015; 32:277-80. [PMID: 25008820 DOI: 10.4103/0255-0857.136563] [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: 11/04/2022]
Abstract
PURPOSE To find out the most suitable serological investigative procedures to diagnose dengue cases effectively in the laboratory practice identifying primary and secondary cases as well as period of suffering. MATERIALS AND METHODS Dengue suspected cases sent to the laboratory in 2012 in central Kolkata by the local physicians were categorised into seven panels according to the investigations asked for such as (1) only dengue-specific NS1 antigen (2) only IgM antibodies, (3) NS1+IgM+IgG antibodies, (4) only IgM and IgG, (5) NS1+IgM, (6) NS1+IgG and (7) only IgG. RESULTS Out of 1892 suspected cases, dengue was diagnosed in 725 (38.3%). Through panels I, II, III, IV, V, VI and VII, it was possible to diagnose dengue in (I) 35.98% (435/1209), (II) 37.5% (24/60), (III) 49% (173/354), (IV) 30.8% (68/221), (V) 60.5% (23/38), (VI) 40% (2/5) and (VII) 0 of cases respectively. Detail information such as confirmed diagnosis, duration of the disease (whether early or prolonged) and classification of primary and secondary dengue in such early or prolonged stages would only be possible in panel III, which information would be helpful for effective monitoring and treatment of dengue patients. In all other panels, merely fragmentary information would be obtained. CONCLUSIONS Serodiagnostic tests dengue-specific NS1 antigen and IgM and IgG antibodies when conducted simultaneously would be able to diagnose confirmed dengue cases categorising primary and secondary dengue along with the duration of the disease, whether early or prolonged.
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Affiliation(s)
| | | | | | | | | | | | - A K Hati
- Calcutta School of Tropical Medicine, Calcutta School of Tropical Medicine, Kolkata, West Bengal, India
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Barman NN, Nath AJ, Neog BK, Das G. Comparative efficacy of fluorescent antibody test, immunoperoxidase test and enzyme linked immuno sorbent assay in detection of rotavirus in cell culture. Virusdisease 2015; 25:239-42. [PMID: 25674590 DOI: 10.1007/s13337-014-0196-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 01/16/2014] [Indexed: 11/30/2022] Open
Abstract
Rotavirus is prevalent worldwide and has been established as a leading cause of mortality due to severe diarrhoea in neonates. Isolation of the virus is a gold standard method for confirmation of rotavirus infection in the host. Propagation of rotavirus in cell culture is a challenge as in many instances the virus does not produce detectable cytopathic effect. This study was undertaken to evaluate the efficacy of fluorescent antibody test (FAT), immunoperoxidase test (IPT) and sandwich ELISA (S-ELISA) to detect rotavirus antigen propagated in MA 104 cell line. The intensity of fluorescence and colour development for I-FAT and I-IPT was categorized and the ELISA OD values were analyzed. The overall mean of detection were 5.16 ± 0.47, 5.16 ± 0.54 and 5.66 ± 0.33 for I-FAT, I-IPT and S-ELISA, respectively. Significantly less number of samples were positive in the initial one or two passage, which increased up to 100 % from third/fourth passage onwards. The study concluded that I-FAT, I-IPT and S-ELISA were equally effective in detecting propagated rotavirus in cell line, and the former two tests are suitable for in situ demonstration of the virus while the later could be used to assay antigen in cell culture fluid.
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Affiliation(s)
- N N Barman
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, Assam India
| | - A J Nath
- Pasteur Institute of India, Coonoor, Nilgiris, 643 103 Tamil Nadu India
| | - B K Neog
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, Assam India
| | - G Das
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, Assam India
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Singh AK, Das G, Roy B, Nath S, Naresh R, Kumar S. Prevalence of Strongyle infections in goat of Maha Koushal region, Madhya Pradesh, India. J Parasit Dis 2014; 40:289-91. [PMID: 27413295 DOI: 10.1007/s12639-014-0496-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 05/20/2014] [Indexed: 10/25/2022] Open
Abstract
The coproculture study on Strongyle infection of goats was carried out in small holder farmers kept under semi-intensive management system in Balaghat, Narsinghpur and Chhindwara district, Madhya Pradesh, during the period from July 2011 to February 2012. Copro-culture of the samples positive for Strongyle infection revealed Haemonchus sp., Trichostrongylus sp., Oesophagostomum sp., Strongyloides sp., and Bunostomum sp. in a decreasing order in goats. The larvae of Haemonchus sp. (61.63 %) and Strongyloides sp. (7.50 %) were highest in Balaghat, Trichostrongylus (18.13 %) in Narsinghpur, while Oesophagostomum sp. (10.50 %) and Bunostomum sp. (5.75 %) were in Chhindwara district. The finding of this study indicates that, even though subclinical in nature, Strongyle infection are one of the major problems that could hamper health and productivity and there is need for design a programme to minimize and control Strongyle infection in goats in the study area.
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Affiliation(s)
- Alok Kumar Singh
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - G Das
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - B Roy
- Department of Livestock Production and Management, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - S Nath
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - Ram Naresh
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
| | - Sahil Kumar
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, Nanaji Deshmukh Veterinary Science University, Jabalpur, Madhya Pradesh India
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Datta S, Maiti S, Das G, Chatterjee A, Ghosh P. Incomplete Kawasaki disease - a diagnostic and therapeutic challenge. J Coll Med Sci-Nepal 2014. [DOI: 10.3126/jcmsn.v9i4.10234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background The diagnosis of classical Kawasaki Disease was based on clinical criteria. The conventional criteria is particularly useful in preventing over diagnosis, but at the same time it may result in failure to recognize the incomplete form of Kawasaki Disease. Objective To suspect incomplete Kawasaki Disease, because early diagnosis and proper treatment may reduce substantial risk of developing coronary artery abnormality which is one of the leading causes of acquired heart disease in children. Method Nine cases of incomplete Kawasaki Disease were diagnosed over a period of one year. The diagnosis of incomplete Kawasaki Disease was based on fever for five days with less than four classical clinical features and cardiac abnormality detected by 2D- echocardiography. A repeat echocardiography was done after 6 weeks of onset of illness. The patients were treated with Intravenous Immunoglobulin and/or aspirin. Result The mean age of the patients was 3.83 years and the mean duration of symptoms before diagnosis was 12.1 days. Apart from other criteria all of our patients had edema and extreme irritability. All the patients had abnormal echocardiographic finding. Five patients received only aspirin due to nonaffordability of Intravenous Immunoglobulin and four patients received both aspirin and Intravenous Immunoglobulin, but the outcome was excellent in all the cases. Conclusion Incomplete Kawasaki Disease can be diagnosed with more awareness and aspirin alone may be used as a second line therapy in case of non affordability of Intravenous Immunoglobulin. Journal of College of Medical Sciences-Nepal, 2013, Vol-9, No-4, 30-35 DOI: http://dx.doi.org/10.3126/jcmsn.v9i4.10234
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Ghimire M, Pahari B, Paudel N, Das G, Sharma SK, Das G. Hymenoptera stings: a study of clinical profile, complication and outcome from a teaching hospital of central Nepal. J Coll Med Sci-Nepal 2014. [DOI: 10.3126/jcmsn.v9i3.10210] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background Hymenoptera sting is a common health hazard in the tropics. Wasp and Bee stings can produce symptoms ranging from local allergic reactions to serious complications including anaphylaxis and multiple organ dysfunction syndromes.Objective To evaluate the clinical profile, management and early outcome of patients with gallbladder cancer.Methods We prospectively analyzed all the consecutive patients with Hymenopterid sting (Wasp and Bee stings), who were admitted in Nephrology Unit in college of Medical Sciences Teaching hospital over a period of two year; from June 2010 to May 2012. Data including demographic profile, clinical profile, complications and outcomes associated with the Hymenopterid stings were entered in a designated profroma and were analyzed.Results A total of 15 cases with Hymenopterid stings (Wasp and Bee stings) were analyzed. Majority of the cases were females (n=8). The male to female ratio was 0.88. The mean age of the case was 37.1± 17.38years. Most of the cases (n=11) were younger subjects d"45 years and majority of them felt in the age group of 21-30 years; (n=4). Mean number of stings (Wasp or Bee stings), were 46 ± 18.4 (12-74) and the mean time to reach the hospital from the bite time was 78.23±82.24 hours (30 minutes-13 days). Black Wasps were the commonest species to inflict the stings in (n=10) cases and Bees in (n=5) cases. The Hymenoptera stings were observed more frequently in the month of July to September in (n=8). The commonest site of bite was head and face seen in (n=11) cases. Among the clinical presentations the commonest clinical presentation was local burning pain and pruritus which was present in all the cases (n=15) followed by nausea (n=10). The commonest clinical sign was bipedal edema which was seen in (n=7) cases. Low Hb (defined as Hb <10gm/dl) was seen in (n=5) cases of Hymenopterid stings. Low platelet (defined as Platelet < 100X109/L) was documented in (n=10) cases. Serum creatinine >1.5mg /dl was seen in (n=7) cases. Low serum albumin (defined as Serum Albumin (<3.5gm/dl) was seen in (n=6) cases. Among the complications, the most common complication was Hepatitis which was seen in (n=9) cases, followed by Acute Kidney Injury. There was no mortality associated with Hymenopterid stings in our study. However 1 patient left against medical advice.Conclusion Black Wasps were the commonest species to inflict the stings in (n=10) cases. The most common complication of Hymenoptera sting was Hepatitis, which was seen in (n=9) of cases, followed by Acute Kidney Injury. Majority of complications were seen in Wasp stings which caused significant morbidity. No mortality was observed in our study except one case; that left hospital against medical advice. Journal of College of Medical Sciences-Nepal, 2013, Vol-9, No-3, 17-24
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Singh AK, Das G, Roy B, Nath S, Naresh R, Kumar S. Prevalence of gastro-intestinal parasitic infections in goat of Madhya Pradesh, India. J Parasit Dis 2014; 39:716-9. [PMID: 26688640 DOI: 10.1007/s12639-014-0420-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 01/13/2014] [Indexed: 10/25/2022] Open
Abstract
Gastrointestinal (GI) parasitism in animals is one of the major problems in India causing emaciation, anaemia, oedema, weakness, diarrhoea and death. Present study was designed to generate epidemiological data on GI parasitism of goats of Madhya Pradesh, India. During 8 months study period, a total of 960 samples were collected and examined by sedimentation and floatation methods followed by egg per gram out of 960 samples, 907 (94.48 %) were positive for one or more gastrointestinal parasite, wherein coccidia was predominant (82.4 %) followed by strongyles (69.27 %), amphistomes (22.71 %), Strongyloides sp. (9.17 %), Trichuris sp. (3.85 %), Moniezia sp. (3.02 %), Schistosomes sp. (2.29 %) and Fasciola sp. (1.77 %). The seasonal incidence was found highest in monsoon (98.06 %) and lowest in winter (91.67 %). The incidence of gastrointestinal parasitism was found higher in kids (96.25 %) in comparison with adult goats (93.89 %).
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Affiliation(s)
- Alok Kumar Singh
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
| | - G Das
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
| | - B Roy
- Department of Livestock Production and Management, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
| | - S Nath
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
| | - Ram Naresh
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
| | - Sahil Kumar
- Department of Veterinary Parasitology, College of Veterinary Science and Animal Husbandry, NanaJi Deshmukh Veterinary Science University Jabalpur, Jabalpur, Madhya Pradesh India
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Chutia R, Das G. Hydrogen and halogen bonding in a concerted act of anion recognition: F− induced atmospheric CO2 uptake by an iodophenyl functionalized simple urea receptor. Dalton Trans 2014; 43:15628-37. [DOI: 10.1039/c4dt00940a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Halogen bonding plays a key role in the fixation of atmospheric CO2 because air-stable crystals of HCO3− dimer by a simple urea based para-iodo substituted acyclic receptor in the presence of n-TBA salt of F− in MeCN solution.
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Affiliation(s)
- R. Chutia
- Department of Chemistry
- Indian Institute of Technology
- Guwahati, India
| | - G. Das
- Department of Chemistry
- Indian Institute of Technology
- Guwahati, India
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Intartaglia R, Das G, Bagga K, Gopalakrishnan A, Genovese A, Povia M, Di Fabrizio E, Cingolani R, Diaspro A, Brandi F. Laser synthesis of ligand-free bimetallic nanoparticles for plasmonic applications. Phys Chem Chem Phys 2013. [DOI: 10.1039/c2cp42656k] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Abstract
OBJECTIVE Optimal therapeutic strategies for subclinical hyperthyroidism are undecided. Overt disease develops in a minority of cases, but the risk factors for progression remain unclear. We examined whether a baseline thyrotrophin (TSH) predicted progression to overt hyperthyroidism in asymptomatic individuals with subclinical hyperthyroidism. DESIGN, PATIENTS AND MEASUREMENTS This was a retrospective study of 323 patients with subclinical hyperthyroidism seen in our institution from 2003 to 2010 (mean age 71 years, males 26·9%, females 73·1%, mean follow-up duration 32 months, range 6-93 months). Serum TSH and free thyroxine (FT4) were documented at baseline and during follow-up. After excluding individuals with nonthyroid causes of low TSH, patients were grouped according to initial TSH as: TSH 0·10-0·39 mU/l (grade I) and TSH < 0·10 mU/l (grade II). RESULTS Only 38 patients (11·8%) developed overt hyperthyroidism with annual progression rates of 0·6-3·7%. Most patients reverted to normal thyroid status (31·6%) or remained subclinically hyperthyroid (56·7%). Progression to frank hyperthyroidism was higher in grade II than in grade I patients (20·3% vs 6·8%, P < 0·001, Chi square test). Kaplan-Meier curves showed faster progression rates in grade II than grade I (P < 0·001, log rank test). In stepwise multivariate Cox regression analysis, TSH < 0·1 mU/l was associated with overt hyperthyroidism (hazard ratio 3·4, confidence interval 1·6-7·0), whereas age, gender, FT4 and aetiological diagnosis were not associated with hyperthyroidism. CONCLUSIONS Thyrotrophin predicts overt hyperthyroidism in asymptomatic individuals with subclinical hyperthyroidism. Patients with TSH < 0·10 mU/l have a higher risk of progressing to hyperthyroidism than those with TSH 0·10-0·39 mU/l.
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Affiliation(s)
- G Das
- Department of Endocrinology and Diabetes, Prince Charles Hospital, Cwm Taf Local Health Board, Merthyr Tydfil, UK
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Abstract
OBJECTIVES The aim of this study was to evaluate clinically and radiographically zinc oxide eugenol (ZOE) and Metapex as root canal filling material in primary teeth. MATERIALS AND METHODS Forty-two necrotic primary teeth in two groups of children in the age group of 4-7 years were obturated with ZOE and Metapex and were followed up clinically and radiographically for a period of 6 months postoperatively. RESULTS The overall success rates of ZOE and Metapex were 85.71% and 90.48%, respectively. CONCLUSION Both ZOE and Metapex gave encouraging results; however, Metapex can be used more safely whenever there is a doubt about the patient's return for follow-up.
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Affiliation(s)
- S Gupta
- Department of Pedodontics and Preventive Dentistry, Hitakarini Dental College, Jabalpur, Madhya Pradesh, India.
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Ataþoðlu C, Akbað HI, Tölü C, Das G, Savas T, Yurtman IY. Effects of kefir as a probiotic source on the performance of goat kids. S AFR J ANIM SCI 2011. [DOI: 10.4314/sajas.v40i4.65258] [Citation(s) in RCA: 3] [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: 11/17/2022]
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Das G, Baglioni P, Mallipedhi A, Okosieme O. Adrenal incidentaloma's: are lessons still to be learned? QJM 2011; 104:374-7. [PMID: 20534654 DOI: 10.1093/qjmed/hcq096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Das G, Baglioni P. Coeliac disease: does it always present with gastrointestinal symptoms? QJM 2010; 103:999-1000. [PMID: 20385568 DOI: 10.1093/qjmed/hcq046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Chakrabarti DP, Pilgrim A, Sastry MKS, Das G. IDENTIFICATION OF LIQUID-LIQUID FLOW PATTERN IN A HORIZONTAL PIPE USING ARTIFICIAL NEURAL NETWORKS. CHEM ENG COMMUN 2010. [DOI: 10.1080/00986445.2010.499836] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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De Angelis F, Pujia A, Falcone C, Iaccino E, Palmieri C, Liberale C, Mecarini F, Candeloro P, Luberto L, de Laurentiis A, Das G, Scala G, Di Fabrizio E. Water soluble nanoporous nanoparticle for in vivo targeted drug delivery and controlled release in B cells tumor context. Nanoscale 2010; 2:2230-2236. [PMID: 20835434 DOI: 10.1039/c0nr00161a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Multitasking nanoparticles are gaining great attention for smart drug delivery systems. The exploration of the nano-scale opens new concrete opportunities for revealing new properties and undiscovered cell-particle interactions. Here we present a biodegradable nanoporous silicon nanoparticle that can be successfully employed for in vivo targeted drug delivery and sustained release. The bare nanoporous nanocarriers can be accurately designed and fabricated with an effective control of porosity, surface chemistry and particle size, up to a few nm. The proposed nanoparticles exhibit several remarkable features including high payload, biodegradability, no toxicity, and multiple loading in water without the need of additional chemical reagents at room temperature. The targeting strategy is based on phage display technology that was successfully used to discover cell surface binding peptide for murine B lymphoma A20 cell line. The peptide used in combination with the nanoporous nanoparticles allows an efficient in vivo targeting, a sustained release and a sensible therapeutic effect.
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Affiliation(s)
- F De Angelis
- Fondazione Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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Ward KA, Das G, Roberts SA, Berry JL, Adams JE, Rawer R, Mughal MZ. A randomized, controlled trial of vitamin D supplementation upon musculoskeletal health in postmenarchal females. J Clin Endocrinol Metab 2010; 95:4643-51. [PMID: 20631020 DOI: 10.1210/jc.2009-2725] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT There has been a resurgence of vitamin D deficiency rickets throughout the developed world, with infants and adolescents being primarily affected. Adolescence is a crucial period for muscle and bone mineral accumulation. OBJECTIVE The aim was to determine the effect of vitamin D supplementation on the adolescent musculoskeletal system. DESIGN AND SETTING We conducted a community-based, double-blind, randomized controlled trial in a secondary school. PARTICIPANTS Postmenarchal 12- to 14-yr-old females participated in the trial. Ninety-nine were screened, 73 were included in randomized controlled trial, and 69 completed the trial. There were no adverse events. INTERVENTION Four doses of 150,000 IU vitamin D(2) (ergocalciferol) were given over 1 yr. MAIN OUTCOME MEASURES Dual-energy x-ray absorptiometry, peripheral quantitative computed tomography, and jumping mechanography were used. RESULTS At follow-up, 25-hydroxyvitamin D [25(OH)D] status was 56.0 ± 8.9 nmol/liter in the intervention group and 15.8 ± 6.6 nmol/liter in controls. There were no effects of supplementation on bone; however, for muscle function, efficiency of movement improved in the vitamin D-treated group. There was an interaction between baseline 25(OH)D concentration and response to vitamin D supplementation for muscle jump velocity. CONCLUSIONS Despite improvements in 25(OH)D status, treatment with vitamin D(2) was not shown to increase mineral accretion, bone geometry or strength, muscle force, or power. There were greater increases in jump velocity in girls with the lowest baseline 25(OH)D concentrations. Lack of effect of intervention after the period of peak mineral and muscle mass accretion suggests that earlier action is required.
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Affiliation(s)
- K A Ward
- Medical Research Council Human Nutrition Research, Elsie Widdowson Laboratory, Cambridge, United Kingdom.
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Patra G, Ali MA, Chanu KV, Jonathan L, Joy L, Prava M, Ravindran R, Das G, Devi LI. PCR Based Diagnosis of Eimeria tenella Infection in Broiler Chicken. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/ijps.2010.813.818] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Suman YK, Mandal TK, Das G. USE OF DIGITAL SIGNAL ANALYSIS TO IDENTIFY SLUG FLOW IN A NARROW VERTICAL PIPE. CHEM ENG COMMUN 2010. [DOI: 10.1080/00986441003622812] [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: 10/19/2022]
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Culman J, Das G, Ohlendorf C, Haass M, Maser-Gluth C, Zuhayra M, Zhao Y, Itoi K. Blockade of tachykinin NK1/NK2 receptors in the brain attenuates the activation of corticotrophin-releasing hormone neurones in the hypothalamic paraventricular nucleus and the sympathoadrenal and pituitary-adrenal responses to formalin-induced pain in the rat. J Neuroendocrinol 2010; 22:467-76. [PMID: 20210847 DOI: 10.1111/j.1365-2826.2010.01987.x] [Citation(s) in RCA: 14] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Evidence from pharmacological studies has implicated substance P (SP), a natural ligand of tachykinin NK(1) receptors which can also interact with NK(2) receptors, in the generation of pressor and tachycardic responses to stress. Using selective blockade of brain NK(1) and NK(2) receptors, we tested in conscious rats the hypothesis that SP initiates, within the neuronal brain circuits, the sympathoadrenal, hypothalamic-pituitary-adrenal (HPA) and behavioural responses to noxious stimuli. Formalin injected s.c. through a chronically implanted catheter in the area of the lower leg was used as a pain stimulus. Rats were pretreated i.c.v. with vehicle or the selective, nonpeptide antagonists of tachykinin NK(1) and NK(2) receptors, RP 67580 and SR 48968, respectively. Ten minutes thereafter, formalin was injected s.c. and the cardiovascular responses were recorded, plasma concentrations of catecholamines, adrenocorticotrophic hormone (ACTH) and corticosterone were determined and the expression of the inducible transcription factor c-Fos in the paraventricular (PVN) and supraoptic nuclei was detected to identify neurones which were activated during pain stimulation. Blockade of NK(1) and NK(2) receptors attenuated the formalin-induced increases in mean arterial pressure and heart rate, adrenaline and ACTH concentrations in plasma, and completely abolished the pain-induced c-Fos expression in corticotrophin-releasing hormone neurones localised in the parvocellular division of the PVN. The results obtained provide pharmacological evidence that tachykinins, most probably SP, act as mediators within the neuronal circuits linked to the initiation and control of the cardiovascular, sympathoadrenal, HPA and behavioural responses to pain stimuli and provide an excitatory input to corticotrophin-releasing hormone neurones in the PVN to activate the HPA axis. Our data demonstrating the inhibition of the complex response pattern to noxious stimuli and stress are consistent with the proposed anxiolytic and antidepressant activity of NK(1) and NK(2) receptor antagonists.
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Affiliation(s)
- J Culman
- Institute of Experimental and Clinical Pharmacology, University Hospital of Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany.
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Abstract
Ellis-van Creveld syndrome is a rare short-limbed disproportionate dwarfism characterized by postaxial polydactyly, several skeletal, oral mucosal and dental anomalies, nail dysplasia and in 50-60% cases of congenital cardiac defects. It is an autosomal recessive disorder with mutations of the EVC1 and EVC2 genes located on chromosome 4p16. Patients with this syndrome usually have a high mortality in early life due to cardiorespiratory problems. We present the case of a six- month-old female infant with Ellis-van Creveld syndrome - essential infantile esotropia, which has been infrequently documented in the literature.
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Affiliation(s)
- D. Das
- Departments of Ophthalmology and Pediatrics, R. G. Kar Medical College, Kolkata, India
| | - G. Das
- Departments of Ophthalmology and Pediatrics, R. G. Kar Medical College, Kolkata, India
| | - T. K. S. Mahapatra
- Departments of Ophthalmology and Pediatrics, R. G. Kar Medical College, Kolkata, India
| | - J. Biswas
- Departments of Ophthalmology and Pediatrics, R. G. Kar Medical College, Kolkata, India
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Uchida K, Kobayashi D, Das G, Onaka T, Inoue K, Itoi K. Participation of the prolactin-releasing peptide-containing neurones in caudal medulla in conveying haemorrhagic stress-induced signals to the paraventricular nucleus of the hypothalamus. J Neuroendocrinol 2010; 22:33-42. [PMID: 19912474 DOI: 10.1111/j.1365-2826.2009.01935.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The prolactin-releasing peptide (PrRP) has been proposed to be a co-transmitter or modulator of noradrenaline (NA) because it colocalises with NA in the A1 (in the ventrolateral reticular formation) and A2 (in the nucleus of the solitary tract; NTS) cell groups in the caudal medulla. The baroreceptor signals, originating from the great vessels, are transmitted primarily to the NTS, and then part of the signals is conveyed to the hypothalamic neuroendocrine neurones via the ascending NA neurones. The hypotensive haemorrhagic paradigm was employed to examine whether the PrRP-containing neurones in the caudal medulla participate in conveying signals to the hypothalamic neuroendocrine neurones. Among the caudal medullary A1 or A2 neurones, the majority of the PrRP-immunoreactive (-ir) neurones became c-Fos-ir at 2 h after hypotensive haemorrhage. Hypothalamic corticotrophin-releasing hormone-ir neurones and vasopressin-ir neurones became c-Fos positive in parallel with the activation of medullary PrRP-ir neurones. After delivery of retrograde tracer fluorogold (FG) to the paraventricular nucleus of the hypothalamus (PVN), part of the PrRP/FG double-labelled neurones in the A1 and A2 became c-Fos-ir after haemorrhage, demonstrating that PrRP-ir neurones participate in conveying the haemorrhagic stress-induced signals from the medulla to the PVN. PrRP and/or NA were microinjected directly to the PVN of conscious rats, and they presented a synergistic action on arginine vasopressin release, whereas an additive action was observed for adrenocorticotrophin release. These results suggest that the PrRP-containing NA neurones in the caudal medulla may relay the haemorrhagic stress-induced medullary inputs to the hypothalamic neuroendocrine neurones.
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Affiliation(s)
- K Uchida
- Laboratory of Information Biology, Graduate School of Information Sciences, Tohoku University, Aramaki-aza Aoba, Sendai, Japan
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Das G, Ray S, Ishwarari S, Roy M, Ghosh P. Ozone nucleolysis for management of pain and disability in prolapsed lumber intervertebral disc. A prospective cohort study. Interv Neuroradiol 2009; 15:330-4. [PMID: 20465917 DOI: 10.1177/159101990901500311] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2009] [Accepted: 06/28/2009] [Indexed: 11/15/2022] Open
Abstract
SUMMARY The prevalence rate of low back pain in a number of studies ranged from 22% to 65% in one year, and lifetime prevalence ranged from 11% to 84%. Over the years many percutaneous minimally invasive therapeutic modalities have evolved. Intradiscal oxygen-ozone therapy has also showed promising results. We undertook a prospective cohort study to evaluate the therapeutic outcome of oxygen-ozone therapy on patients with lumber disc herniation in the Indian population. After obtaining ethical committee and investigational review board permission, 53 consecutive patients complying with selection criteria were treated with a single session of oxygenozone therapy. All presented with clinical signs of lumber nerve root compression supported by CT and MRI findings. All patients received 3-7 ml of ozone-oxygen mixture at an ozone concentration of 29-32 mc/ml of oxygen. Therapeutic outcome was assessed after three weeks, three months, six months, one year and two years on a visual analog scale and Oswestry low back pain disability questionnaire. Pain intensity was significantly reduced following treatment (VAS baseline 7.58-/+0.86, after three weeks 2.75-/+1.42 and after two years 2.64-/+2.14). Similarly the Oswestry disability index showed a remarkable improvement in the functional status of the patients (p<0.05). No major complication was observed in this case series. Oxygen-ozone treatment is highly effective in relieving low back pain due to lumber disc herniation.
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Affiliation(s)
- G Das
- Charnock Hospital; Kolkata,West Bengal, India -
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