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Gupta S, Pandey P. Spectrum of Dermatological Manifestations among Travelers presenting at a Travel Medicine Center in Nepal. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.1178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kim M, Maldonado J, El Alam M, Pandey P, Nguyen Q, Moon B, Bird J, Satcher R, Lewis V, Lin P, Tang C, Koong A, Colbert L. Retreatment after Single Fraction Palliative Bone Metastasis Treatment in the Modern Era. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pandey P, Kim M, Todd S, Grosshans D, Mitchell M, Minsky B, Klopp A, Moon B, Koong A, Colbert L. Nurse Practitioner Navigation Program within a Rapid Access Bone Metastases Clinic Improves Patient Access to Radiation. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ganapathy S, Pandey P. Neurosurgery in paediatric strokes. EGYPTIAN JOURNAL OF NEUROSURGERY 2020. [DOI: 10.1186/s41984-020-00091-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractPaediatric strokes are a different entity owing to the difference in pathological entity causing the stroke as well as difficulty in treatment and management due to the presence of a growing brain and small vascular volume making surgery and endovascular intervention dangerous. Yet, the high neuronal plasticity coupled with unique surgical and endovascular procedures makes surgery in these conditions rewarding with improving morbidity and mortality statistics. The field is young and dynamic leading to constant change and updating. We attempt to review the current recommendations with our own experience in paediatric neurosurgery for paediatric strokes and present an overview of common conditions causing paediatric strokes. A brief review of the literature is also supplied for reference.
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Jabbour R, Owen T, Reinsch M, Pandey P, Wang B, King O, Smith G, Stuckey D, Shanmuganathan M, Lyon A, Ng F, Terracciano C, Weinberger F, Eschenghagen T, Harding S. P5385Development and preclinical testing of upscaled engineered heart tissue for use in translational studies. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
The lack of efficacy of stem cell therapy for the treatment of heart failure may be related to the poor retention rates offered by existing delivery methods (intra-coronary/ intramyocardial). Tissue engineering strategies improve cell retention in small animal models but data regarding engineered heart tissue (EHT) patches large enough for human studies are lacking.
Purpose
To upscale EHT to a clinically relevant size and mature the patch in-vitro. Once matured to undergo preclinical testing in a rabbit model of myocardial infarction.
Methods
We developed an upscaled EHT patch (3cm x 2cm x 1.5mm) able to contain up to 50 million human induced pluripotent stem cell derived cardiomyocytes (hiPSC-CM; Fig A/B). Myocardial infarction model was performed by permanent ligation.
Results
The patches began to beat spontaneously within 3 days of fabrication and after 28 days of dynamic culture (Late EHTs) showed the development of several mature characteristics when compared to early patches (<14 days from fabrication). For example, late EHTs contained hiPSC-CMs which were more aligned (hiPSC-CM accumulative angle change: early 2702±778 degrees [n=4] vs late 922±186 [n=5], p=0.042); showed better contraction kinetics (early peak contraction amplitude 87.9±5.8a.u. versus late 952±304a.u.; p<0.001) and faster calcium transients (time to peak: early 200.8±8.8ms [n=5] vs late 147.7±10.2ms [n=6], p=0.004; time to 75% decay: early 274±9.7ms vs late 219.9±2.7ms, p=0.0003).
We then tested the EHT patch in-vivo using a rabbit model (Fig C). Patches were applied to normal (n=5) or infarcted hearts (n=8). Sham operations used non-cellular fibrin patches (n=5). The mean fraction of troponin positive cells in the graft was 27.8±10.3% at 25.2±1.7 days relative to day 0 [n=5] and KU80 (human specific marker) staining confirmed that this was of human origin. CD31 (Fig D) and KU80 staining revealed that the grafts were well vascularized and that the vasculature was not human in origin (therefore were originating from the host). Ex-vivo optical mapping revealed evidence of electrical coupling between the graft and host at 2 weeks and preliminary experiments indicated that the patch improved left ventricular function when grafted onto infarcted hearts. Telemetry recordings in vivo and arrhythmia provocation protocols (ex vivo) indicated that the patch was not proarrhythmic.
Figure 1. A/B) EHT Images; C) 20x troponin T (brown) of rabbit myocardium/EHT (2 weeks after grafting), blue counterstain = haematoxylin, red lines = EHT borders; D) 63x CD31 staining (brown) rabbit/EHT border zone (2 weeks after grafting), blue stain = haematoxylin, red lines = graft/host border zones.
Conclusion
We successfully upscaled hiPSC-CM derived EHT to a clinically relevant size and demonstrated feasibility and integration using a rabbit model of myocardial infarction. Tissue engineering strategies may be the preferred modality of cell delivery for future cardiac regenerative medicine studies.
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Khoshpouri P, Hazhirkarzar B, Ameli S, Pandey A, Ghadimi M, Rezvani Habibabadi R, Aliyari Ghasabeh M, Pandey P, Shaghaghi M, Kamel I. Quantitative spleen and liver volume changes predict survival of patients with primary sclerosing cholangitis. Clin Radiol 2019; 74:734.e13-734.e20. [DOI: 10.1016/j.crad.2019.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 05/20/2019] [Indexed: 01/01/2023]
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Sangma S, Chopra J, Sehgal G, Lakra V, Pandey P. Variations in posterior inferior cerebellar artery and its clinical significance in Uttar Pradesh region: A 64-slice CT angiographic study. J ANAT SOC INDIA 2018. [DOI: 10.1016/j.jasi.2018.06.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Shao N, Pandey A, Ghasabeh MA, Khoshpouri P, Pandey P, Varzaneh FN, Zarghampour M, Fouladi D, Pawlik TM, Anders RA, Kamel IR. Long-term follow-up of hepatic adenoma and adenomatosis: analysis of size change on imaging with histopathological correlation. Clin Radiol 2018; 73:958-965. [PMID: 30031588 DOI: 10.1016/j.crad.2018.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 06/21/2018] [Indexed: 01/01/2023]
Abstract
AIM To analyse the change in size on follow-up of hepatic adenomas (HAs) and adenomatosis, and to investigate the relationship of imaging features with size change. MATERIALS AND METHODS The study included 44 patients (142 lesions) who underwent magnetic resonance imaging (MRI) or computed tomography (CT) for diagnosis and follow-up of HA. The imaging features and percentage change in maximum tumour dimension were observed over a follow-up duration of up to 139 months. RESULTS With an average follow-up of 43 months, 37% lesions decreased in size, 58% were stable, 4% increased; one lesion regressed completely. Adenomas were stratified into size groups (<3, 3-5, and ≥5 cm). Size change among the three groups was similar (p>0.05). Percent size change was different for lesions followed for ≤12 months (-7.2%) compared with lesions followed for 13-60 months (-20.5%), and those followed for ≥60 months (-23.5%; p<0.05); there was no difference between lesions followed for 13-60 months and ≥60 months (p=0.523). Baseline size and percent size change was similar between the hepatocyte nuclear factor 1α-inactivated HA (HA-H) and inflammatory HA (HA-I) subtype (p>0.05). CONCLUSION Most adenomas were either stable or regressed on follow-up. Size change was independent of baseline size. After an initial size decrease within 5 years, no further size reduction was noted on extended follow-up. The percent size change in the HA-H and HA-I subtype was similar.
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Das P, Pandey P, Harishankar A, Chandy M, Bhattacharya S, Chakrabarti A. Standardization of a two-step real-time polymerase chain reaction based method for species-specific detection of medically important Aspergillus species. Indian J Med Microbiol 2018; 35:381-388. [PMID: 29063883 DOI: 10.4103/ijmm.ijmm_17_190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Standardization of Aspergillus polymerase chain reaction (PCR) poses two technical challenges (a) standardization of DNA extraction, (b) optimization of PCR against various medically important Aspergillus species. Many cases of aspergillosis go undiagnosed because of relative insensitivity of conventional diagnostic methods such as microscopy, culture or antigen detection. The present study is an attempt to standardize real-time PCR assay for rapid sensitive and specific detection of Aspergillus DNA in EDTA whole blood. MATERIALS AND METHODS Three nucleic acid extraction protocols were compared and a two-step real-time PCR assay was developed and validated following the recommendations of the European Aspergillus PCR Initiative in our setup. In the first PCR step (pan-Aspergillus PCR), the target was 28S rDNA gene, whereas in the second step, species specific PCR the targets were beta-tubulin (for Aspergillus fumigatus, Aspergillus flavus, Aspergillus terreus), gene and calmodulin gene (for Aspergillus niger). RESULTS Species specific identification of four medically important Aspergillus species, namely, A. fumigatus, A. flavus, A. niger and A. terreus were achieved by this PCR. Specificity of the PCR was tested against 34 different DNA source including bacteria, virus, yeast, other Aspergillus sp., other fungal species and for human DNA and had no false-positive reactions. The analytical sensitivity of the PCR was found to be 102 CFU/ml. CONCLUSION The present protocol of two-step real-time PCR assays for genus- and species-specific identification for commonly isolated species in whole blood for diagnosis of invasive Aspergillus infections offers a rapid, sensitive and specific assay option and requires clinical validation at multiple centers.
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Biswas S, Niu M, Pandey P, Appuhamy JADRN, Leytem AB, Kebreab E, Dungan RS. Effect of Dairy Manure Storage Conditions on the Survival of E. coli O157:H7 and Listeria. JOURNAL OF ENVIRONMENTAL QUALITY 2018; 47:185-189. [PMID: 29415095 DOI: 10.2134/jeq2017.06.0224] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dairy manure is regularly applied to crop fields as a solid or liquid to improve the soil nutrient status. However, pathogens may survive during manure storage and enter the environment during application. In this study, three storage practices were evaluated to understand the survival patterns of O157:H7 and spp. in dairy manure using a culture-based approach. To replicate common farm manure storage techniques, solid manure was stacked as piles with periodic turning or as static piles without turning, whereas liquid manure (feces, urine, and water) was stored as a slurry in small tanks to simulate lagoon conditions. The and levels in the manure samples were determined for 29 wk. Results showed that there was an initial reduction in bacteria levels in the first month; however, both and managed to survive in the solid manure piles for the full study period. In slurry samples, was not detected after 14 wk, but survived until the end of the experiment at relatively lower levels than in the solid manure piles. Ambient weather and pile size were identified as the main reasons for bacteria survival during the course of the experiment. The outcome of this study is important in terms of understanding pathogen survival in manure piles and slurries prior to their application to crop fields.
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Shaik M, Rao VK, Ramana G, Halder M, Gutch PK, Pandey P, Jain R. p-Hexafluoroisopropanol phenyl functionalized graphene for QCM based detection of dimethyl methylphosphonate, a simulant of the nerve agent sarin. RSC Adv 2018; 8:8240-8245. [PMID: 35541990 PMCID: PMC9078545 DOI: 10.1039/c7ra12272a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/19/2018] [Indexed: 11/21/2022] Open
Abstract
The hexafluoroisopropanol moiety was grafted onto graphene and used as a sensing layer for the detection of a nerve agent simulant using QCM.
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Silva-del-Río N, Rolle D, García-Muñoz A, Rodríguez-Jiménez S, Valldecabres A, Lago A, Pandey P. Colostrum immunoglobulin G concentration of multiparous Jersey cows at first and second milking is associated with parity, colostrum yield, and time of first milking, and can be estimated with Brix refractometry. J Dairy Sci 2017; 100:5774-5781. [DOI: 10.3168/jds.2016-12394] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 03/07/2017] [Indexed: 11/19/2022]
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Pandey P, Irulappan V, Bagavathiannan MV, Senthil-Kumar M. Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits. FRONTIERS IN PLANT SCIENCE 2017; 8:537. [PMID: 28458674 PMCID: PMC5394115 DOI: 10.3389/fpls.2017.00537] [Citation(s) in RCA: 302] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 03/27/2017] [Indexed: 05/18/2023]
Abstract
Global warming leads to the concurrence of a number of abiotic and biotic stresses, thus affecting agricultural productivity. Occurrence of abiotic stresses can alter plant-pest interactions by enhancing host plant susceptibility to pathogenic organisms, insects, and by reducing competitive ability with weeds. On the contrary, some pests may alter plant response to abiotic stress factors. Therefore, systematic studies are pivotal to understand the effect of concurrent abiotic and biotic stress conditions on crop productivity. However, to date, a collective database on the occurrence of various stress combinations in agriculturally prominent areas is not available. This review attempts to assemble published information on this topic, with a particular focus on the impact of combined drought and pathogen stresses on crop productivity. In doing so, this review highlights some agriculturally important morpho-physiological traits that can be utilized to identify genotypes with combined stress tolerance. In addition, this review outlines potential role of recent genomic tools in deciphering combined stress tolerance in plants. This review will, therefore, be helpful for agronomists and field pathologists in assessing the impact of the interactions between drought and plant-pathogens on crop performance. Further, the review will be helpful for physiologists and molecular biologists to design agronomically relevant strategies for the development of broad spectrum stress tolerant crops.
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Adamson P, Aliaga L, Ambrose D, Anfimov N, Antoshkin A, Arrieta-Diaz E, Augsten K, Aurisano A, Backhouse C, Baird M, Bambah BA, Bays K, Behera B, Bending S, Bernstein R, Bhatnagar V, Bhuyan B, Bian J, Blackburn T, Bolshakova A, Bromberg C, Brown J, Brunetti G, Buchanan N, Butkevich A, Bychkov V, Campbell M, Catano-Mur E, Childress S, Choudhary BC, Chowdhury B, Coan TE, Coelho JAB, Colo M, Cooper J, Corwin L, Cremonesi L, Cronin-Hennessy D, Davies GS, Davies JP, Derwent PF, Desai S, Dharmapalan R, Ding P, Djurcic Z, Dukes EC, Duyang H, Edayath S, Ehrlich R, Feldman GJ, Frank MJ, Gabrielyan M, Gallagher HR, Germani S, Ghosh T, Giri A, Gomes RA, Goodman MC, Grichine V, Group R, Grover D, Guo B, Habig A, Hartnell J, Hatcher R, Hatzikoutelis A, Heller K, Himmel A, Holin A, Hylen J, Jediny F, Judah M, Kafka GK, Kalra D, Kasahara SMS, Kasetti S, Keloth R, Kolupaeva L, Kotelnikov S, Kourbanis I, Kreymer A, Kumar A, Kurbanov S, Lang K, Lee WM, Lin S, Liu J, Lokajicek M, Lozier J, Luchuk S, Maan K, Magill S, Mann WA, Marshak ML, Matera K, Matveev V, Méndez DP, Messier MD, Meyer H, Miao T, Miller WH, Mishra SR, Mohanta R, Moren A, Mualem L, Muether M, Mufson S, Murphy R, Musser J, Nelson JK, Nichol R, Niner E, Norman A, Nosek T, Oksuzian Y, Olshevskiy A, Olson T, Paley J, Pandey P, Patterson RB, Pawloski G, Pershey D, Petrova O, Petti R, Phan-Budd S, Plunkett RK, Poling R, Potukuchi B, Principato C, Psihas F, Radovic A, Rameika RA, Rebel B, Reed B, Rocco D, Rojas P, Ryabov V, Sachdev K, Sail P, Samoylov O, Sanchez MC, Schroeter R, Sepulveda-Quiroz J, Shanahan P, Sheshukov A, Singh J, Singh J, Singh P, Singh V, Smolik J, Solomey N, Song E, Sousa A, Soustruznik K, Strait M, Suter L, Talaga RL, Tamsett MC, Tas P, Thayyullathil RB, Thomas J, Tian X, Tognini SC, Tripathi J, Tsaris A, Urheim J, Vahle P, Vasel J, Vinton L, Vold A, Vrba T, Wang B, Wetstein M, Whittington D, Wojcicki SG, Wolcott J, Yadav N, Yang S, Zalesak J, Zamorano B, Zwaska R. Measurement of the Neutrino Mixing Angle θ_{23} in NOvA. PHYSICAL REVIEW LETTERS 2017; 118:151802. [PMID: 28452513 DOI: 10.1103/physrevlett.118.151802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Indexed: 06/07/2023]
Abstract
This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×10^{20} protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ_{23} mixing (θ_{23}=π/4). Assuming the normal mass hierarchy, we find Δm_{32}^{2}=(2.67±0.11)×10^{-3} eV^{2} and sin^{2}θ_{23} at the two statistically degenerate values 0.404_{-0.022}^{+0.030} and 0.624_{-0.030}^{+0.022}, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.
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Shewade HD, Chadha SS, Gupta V, Tripathy JP, Satyanarayana S, Sagili K, Mohanty S, Bera OP, Pandey P, Rajeswaran P, Jayaraman G, Santhappan A, Bajpai UN, Mamatha AM, Maiser R, Naqvi AJ, Pandurangan S, Nath S, Ghule VH, Das A, Prasad BM, Biswas M, Singh G, Mallick G, Jeyakumar Jaisingh AJ, Rao R, Kumar AMV. Data collection using open access technology in multicentre operational research involving patient interviews. Public Health Action 2017; 7:74-77. [PMID: 28744430 DOI: 10.5588/pha.15.0079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 11/19/2016] [Indexed: 11/10/2022] Open
Abstract
Conducting multicentre operational research is challenging due to issues related to the logistics of travel, training, supervision, monitoring and troubleshooting support. This is even more burdensome in resource-constrained settings and if the research includes patient interviews. In this article, we describe an innovative model that uses open access tools such as Dropbox, TeamViewer and CamScanner for efficient, quality-assured data collection in an ongoing multicentre operational research study involving record review and patient interviews. The tools used for data collection have been shared for adaptation and use by other researchers.
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Singh AK, Pandey P, Tewari M, Pandey HP, Gambhir IS, Shukla HS. Free radicals hasten head and neck cancer risk: A study of total oxidant, total antioxidant, DNA damage, and histological grade. J Postgrad Med 2017; 62:96-101. [PMID: 27089108 PMCID: PMC4944358 DOI: 10.4103/0022-3859.180555] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background: Free radicals such as reactive oxygen species (ROS), which induce oxidative stress, are the main contributors to head and neck carcinogenesis (HNC). The present study was conducted with the aim to assess the oxidant/antioxidant status and DNA damage analysis in head and neck cancer/control patients. Materials and Methods: This prospective study was conducted on 60 patients with biopsy-proven HNC and 17 patients of head and neck disease (HND). The total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) were determined by novel automatic colorimetric methods from tissue homogenate. DNA damage analysis was determined by single cell gel electrophoresis (SCGE). Results: The mean age of the study cohort was 46.65 ± 14.84 years for HNC patients, while it was 49.41 ± 13.00 years for HND patients. There were no significant differences found between the two groups with respect to demographic presentation except tobacco addiction. The association between oxidative stress parameters and DNA damage analysis with study group revealed the following. (A) DNA damage - tissue homogenate TOS and OSI were significantly higher in HNC subjects than in HND (16.06 ± 1.78 AU vs 7.86 ± 5.97 AU, P < 0.001; 53.00 ± 40.61 vs 19.67 ± 21.90, P < 0.01; 7.221 ± 5.80 vs 2.40 ± 2.54, P < 0.01, respectively), while TAS was significantly decreased. (B) Aggressive histological features were identified, more commonly with higher TOS and lower TAS [probability (P) = 0.002, relative risk (RR) = 11.838, 95% confidence interval CI = 2.514-55.730 and P = 0.043, RR = 0.271, 95% CI = 0.077-0.960, respectively]. Conclusion: The increase in free radicals may be the event that led to the reduction of antioxidant status in HNC, thus explaining the oxidative damage of DNA and the severity of disease. Increased OSI represents a general mechanism in its pathogenesis.
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Pandey P, Irulappan V, Bagavathiannan MV, Senthil-Kumar M. Impact of Combined Abiotic and Biotic Stresses on Plant Growth and Avenues for Crop Improvement by Exploiting Physio-morphological Traits. FRONTIERS IN PLANT SCIENCE 2017. [PMID: 28458674 DOI: 10.3389/flps.2017.00537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Global warming leads to the concurrence of a number of abiotic and biotic stresses, thus affecting agricultural productivity. Occurrence of abiotic stresses can alter plant-pest interactions by enhancing host plant susceptibility to pathogenic organisms, insects, and by reducing competitive ability with weeds. On the contrary, some pests may alter plant response to abiotic stress factors. Therefore, systematic studies are pivotal to understand the effect of concurrent abiotic and biotic stress conditions on crop productivity. However, to date, a collective database on the occurrence of various stress combinations in agriculturally prominent areas is not available. This review attempts to assemble published information on this topic, with a particular focus on the impact of combined drought and pathogen stresses on crop productivity. In doing so, this review highlights some agriculturally important morpho-physiological traits that can be utilized to identify genotypes with combined stress tolerance. In addition, this review outlines potential role of recent genomic tools in deciphering combined stress tolerance in plants. This review will, therefore, be helpful for agronomists and field pathologists in assessing the impact of the interactions between drought and plant-pathogens on crop performance. Further, the review will be helpful for physiologists and molecular biologists to design agronomically relevant strategies for the development of broad spectrum stress tolerant crops.
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Das P, Pandey P, Harishankar A, Chandy M, Bhattacharya S. A high yield DNA extraction method for medically important Candida species: A comparison of manual versus QIAcube-based automated system. Indian J Med Microbiol 2016; 34:533-535. [PMID: 27934838 DOI: 10.4103/0255-0857.195360] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The prognosis of infected individuals with candidemia depends on rapid and precise diagnosis which enables optimising treatment. Three fungal DNA extraction protocols have been compared in this study for medically important Candida species. The quality and quantity of the DNA extracted by physical, chemical and automated protocols was compared using NanoDrop ND-2000 spectrophotometer. It was found that the yield and purity (260/230) ratio of extracted DNA was significantly high in the physical treatment-based protocol as compared to chemical based or automated protocol. Extracted DNA-based real time-polymerase chain reaction showed an analytical sensitivity of 103 cfu/mL. The result of this study suggests physical treatment is the most successful extraction technique compared to other two protocols.
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Agarwal S, Pandey P, Durgapal P, Krishna M. Linitis plastica like primary signet ring cell carcinoma of the gallbladder - an extremely rare variant. Pathologica 2016; 108:169-174. [PMID: 28195258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Signet ring carcinoma (SRCC) of gallbladder is an extremely rare tumor accounting for approximately 3% of all gallbladder carcinomas, with a handful of case reports in the literature. We report a case of signet ring cell carcinoma of the gallbladder in a 70 year-old female who was operated upon after the preoperative diagnosis of cholecystitis with cholelithiasis, based on ultrasonographic findings and subsequently diagnosed as signet ring cell carcinoma of the gallbladder on histopathological examination. Grossly there was no discrete growth, instead tumor presented as linitis plastica like diffuse thickening of the gallbladder wall. Microscopic examination revealed a diffusely infiltrative carcinoma comprised exclusively of signet ring cells and confirmed by periodic acid-Schiff (PAS), Alcian blue & Cytokeratin 7 stains. Post -operative clinico-radiological workup was done to exclude secondary. This highly aggressive signet ring cell carcinoma of gallbladder is being reported because of its rarity, its unique histomorphological features and diagnostic inadequacy of the routinely performed ultrasonography as well as highlighting the use of special stains and immunohistochemistry to exclude other possibilities. Our case highlights that routine histopathological examination of all the cholecystectomy specimens is a must to facilitate the early diagnosis of aggressive signet ring cell carcinoma gallbladder.
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Pandey P, Cao W, Wang Y, Vaddella V. Predicting Salmonella Typhimurium reductions in poultry ground carcasses. Poult Sci 2016; 95:2640-2646. [PMID: 27466432 DOI: 10.3382/ps/pew242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2016] [Indexed: 11/20/2022] Open
Abstract
To improve understanding of Salmonella Typhimurium LT2 inactivation in ground poultry carcasses, a series of experiments were carried out at multiple temperatures. Subsequently, a non-linear model was developed to predict Salmonella inactivation at composting and low rendering temperatures. The Salmonella inactivation study was conducted using bench-top experiments at 38, 48, 55, 62.5, 70, and 78°C in mixed and non-mixed reactors using ground poultry carcasses as a feedstock. Subsequently, these observations were used for developing a non-linear model. The model predictions were compared with the observations of a different set of experiments. The comparisons among predictions and observations showed that the model predictions are reasonable and can be useful to determine the time required for Salmonella inactivation in poultry carcasses at multiple temperatures. Results showed that at composting conditions, when temperature varies between 48 and 62.5°C, Salmonella survival can prolong between 10,000 and 25,000 min (7 to 17 d). If ambient temperature is maintained at low temperature rendering range (70 to 78°C), then Salmonella survival can last for 90 to 120 minutes. We anticipate that this study will help in improving the existing understanding of Salmonella survival in poultry carcasses.
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Adamson P, Ader C, Andrews M, Anfimov N, Anghel I, Arms K, Arrieta-Diaz E, Aurisano A, Ayres DS, Backhouse C, Baird M, Bambah BA, Bays K, Bernstein R, Betancourt M, Bhatnagar V, Bhuyan B, Bian J, Biery K, Blackburn T, Bocean V, Bogert D, Bolshakova A, Bowden M, Bower C, Broemmelsiek D, Bromberg C, Brunetti G, Bu X, Butkevich A, Capista D, Catano-Mur E, Chase TR, Childress S, Choudhary BC, Chowdhury B, Coan TE, Coelho JAB, Colo M, Cooper J, Corwin L, Cronin-Hennessy D, Cunningham A, Davies GS, Davies JP, Del Tutto M, Derwent PF, Deepthi KN, Demuth D, Desai S, Deuerling G, Devan A, Dey J, Dharmapalan R, Ding P, Dixon S, Djurcic Z, Dukes EC, Duyang H, Ehrlich R, Feldman GJ, Felt N, Fenyves EJ, Flumerfelt E, Foulkes S, Frank MJ, Freeman W, Gabrielyan M, Gallagher HR, Gebhard M, Ghosh T, Gilbert W, Giri A, Goadhouse S, Gomes RA, Goodenough L, Goodman MC, Grichine V, Grossman N, Group R, Grudzinski J, Guarino V, Guo B, Habig A, Handler T, Hartnell J, Hatcher R, Hatzikoutelis A, Heller K, Howcroft C, Huang J, Huang X, Hylen J, Ishitsuka M, Jediny F, Jensen C, Jensen D, Johnson C, Jostlein H, Kafka GK, Kamyshkov Y, Kasahara SMS, Kasetti S, Kephart K, Koizumi G, Kotelnikov S, Kourbanis I, Krahn Z, Kravtsov V, Kreymer A, Kulenberg C, Kumar A, Kutnink T, Kwarciancy R, Kwong J, Lang K, Lee A, Lee WM, Lee K, Lein S, Liu J, Lokajicek M, Lozier J, Lu Q, Lucas P, Luchuk S, Lukens P, Lukhanin G, Magill S, Maan K, Mann WA, Marshak ML, Martens M, Martincik J, Mason P, Matera K, Mathis M, Matveev V, Mayer N, McCluskey E, Mehdiyev R, Merritt H, Messier MD, Meyer H, Miao T, Michael D, Mikheyev SP, Miller WH, Mishra SR, Mohanta R, Moren A, Mualem L, Muether M, Mufson S, Musser J, Newman HB, Nelson JK, Niner E, Norman A, Nowak J, Oksuzian Y, Olshevskiy A, Oliver J, Olson T, Paley J, Pandey P, Para A, Patterson RB, Pawloski G, Pearson N, Perevalov D, Pershey D, Peterson E, Petti R, Phan-Budd S, Piccoli L, Pla-Dalmau A, Plunkett RK, Poling R, Potukuchi B, Psihas F, Pushka D, Qiu X, Raddatz N, Radovic A, Rameika RA, Ray R, Rebel B, Rechenmacher R, Reed B, Reilly R, Rocco D, Rodkin D, Ruddick K, Rusack R, Ryabov V, Sachdev K, Sahijpal S, Sahoo H, Samoylov O, Sanchez MC, Saoulidou N, Schlabach P, Schneps J, Schroeter R, Sepulveda-Quiroz J, Shanahan P, Sherwood B, Sheshukov A, Singh J, Singh V, Smith A, Smith D, Smolik J, Solomey N, Sotnikov A, Sousa A, Soustruznik K, Stenkin Y, Strait M, Suter L, Talaga RL, Tamsett MC, Tariq S, Tas P, Tesarek RJ, Thayyullathil RB, Thomsen K, Tian X, Tognini SC, Toner R, Trevor J, Tzanakos G, Urheim J, Vahle P, Valerio L, Vinton L, Vrba T, Waldron AV, Wang B, Wang Z, Weber A, Wehmann A, Whittington D, Wilcer N, Wildberger R, Wildman D, Williams K, Wojcicki SG, Wood K, Xiao M, Xin T, Yadav N, Yang S, Zadorozhnyy S, Zalesak J, Zamorano B, Zhao A, Zirnstein J, Zwaska R. First Measurement of Electron Neutrino Appearance in NOvA. PHYSICAL REVIEW LETTERS 2016; 116:151806. [PMID: 27127961 DOI: 10.1103/physrevlett.116.151806] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Indexed: 06/05/2023]
Abstract
We report results from the first search for ν_{μ}→ν_{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{20} protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π<δ_{CP}<0.5π in the inverted mass hierarchy at the 90% C.L.
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Singh M, Singh AK, Singh S, Pandey P, Chandra S, Gambhir IS. Angiotensin-converting enzyme gene I/D polymorphism increases the susceptibility to hypertension and additive diseases: A study on North Indian patients. Clin Exp Hypertens 2016; 38:305-11. [DOI: 10.3109/10641963.2015.1107085] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Singh M, Singh AK, Pandey P, Chandra S, Singh KA, Gambhir IS. Molecular genetics of essential hypertension. Clin Exp Hypertens 2016; 38:268-77. [PMID: 27028574 DOI: 10.3109/10641963.2015.1116543] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Hypertension is a major public health problem in the developing as well as in developed countries due to its high prevalence and its association with coronary heart disease, renal disease, stroke, peripheral vascular disease, and related disorders. Essential hypertension (EH) is the most common diagnosis in this disease, suggesting that a monocausal etiology has not been identified. However, a number of risk factors associated with EH have also been identified such as age, sex, demographic, environmental, genetic, and vascular factors. Recent advances in molecular biological research had achieved clarifying the molecular basis of Mendelian hypertensive disorders. Molecular genetic studies have now identified mutations in several genes that cause Mendelian forms of hypertension in humans. However, none of the single genetic variants has emerged from linkage or association analyses as consistently related to the blood pressure level in every sample and in all populations. Besides, a number of polymorphisms in candidate genes have been associated with differences in blood pressure. The most prominent candidate has been the polymorphisms in the renin-angiotensin-aldosterone system. In total, EH is likely to be a polygenic disorder that results from inheritance of a number of susceptibility genes and involves multiple environmental determinants. These determinants complicate the study of blood pressure variations in the general population. The complex nature of the hypertension phenotype makes large-scale studies indispensable, when screening of familial and genetic factors was intended. In this review, recent genetic studies exploring the molecular basis of EH, including different molecular pathways, are highlighted.
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Gupta E, Pandey P, Kumar A, Sharma MK, Sarin SK. Correlation between two chemiluminescence based assays for quantification of hepatitis B surface antigen in patients with chronic hepatitis B infection. Indian J Med Microbiol 2016; 33:96-100. [PMID: 25560010 DOI: 10.4103/0255-0857.148400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
PURPOSE Hepatitis B surface Antigen (HBsAg) is the hallmark in diagnosing hepatitis B virus (HBV) infection. In India many commercial assays are available for detection of HBsAg but very few can measure it quantitatively. The present study presents the comparative evaluation of two methods and their correlation with serum HBsAg in chronic hepatitis B (CHB) patients. MATERIALS AND METHODS Consecutive patients of CHB were included and there HBsAg levels were measured by two methods: (i) Elecsys, Roche Diagnostics, a qualitative assay and (ii) Architect, Abbott Diagnostics, a quantitative assay. The HBV DNA was measured by real-time polymerase chain reaction (qPCR). RESULTS Total of 136 patients were included in the study and there was a significant overall correlation between both the assays (correlation coefficient [r] = 0.83; P < 0.001). Assays correlated well with each other across all subgroups of CHB: treatment naοve (r = 0.73; P < 0.001, n = 32), on treatment (r = 0.56; P < 0.05, n = 104), hepatitis Be (HBe) antigen positive (r = 0.67; P < 0.001, n = 62) and anti-HBe positive (r = 0.61; P < 0.05, n = 74) group. On correlation with serum HBV DNA, Architect assay demonstrated good correlation (r = 0.73; P < 0.001, n = 136) as compared to the Elecsys assay (r = 0.27; P = 0.068, n = 136). Architect HBsAg QT assay (A1) also correlated well with HBV DNA in the treatment naοve group (r = 0.69; P < 0.001, n = 32). CONCLUSIONS Our study hence proved that both the assays are comparable and a simple qualitative assay with in-house modification can be used easily for quatitation of HBsAg in clinical samples.
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