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Shi Q, Xiong Y, Kaur P, Sy ND, Gan J. Contaminants of emerging concerns in recycled water: Fate and risks in agroecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152527. [PMID: 34953850 DOI: 10.1016/j.scitotenv.2021.152527] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 11/23/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Recycled water (RW) has been increasingly recognized as a valuable source of water for alleviating the global water crisis. When RW is used for agricultural irrigation, many contaminants of emerging concern (CECs) are introduced into the agroecosystem. The ubiquity of CECs in field soil, combined with the toxic, carcinogenic, or endocrine-disrupting nature of some CECs, raises significant concerns over their potential risks to the environment and human health. Understanding such risks and delineating the fate processes of CECs in the water-soil-plant continuum contributes to the safe reuse of RW in agriculture. This review summarizes recent findings and provides an overview of CECs in the water-soil-plant continuum, including their occurrence in RW and irrigated soil, fate processes in agricultural soil, offsite transport including runoff and leaching, and plant uptake, metabolism, and accumulation. The potential ecological and human health risks of CECs are also discussed. Studies to date have shown limited accumulation of CECs in irrigated soils and plants, which may be attributed to multiple attenuation processes in the rhizosphere and plant, suggesting minimal health risks from RW-fed food crops. However, our collective understanding of CECs is rather limited and knowledge of their offsite movement and plant accumulation is particularly scarce for field conditions. Given a large number of CECs and their occurrence at trace levels, it is urgent to develop strategies to prioritize CECs so that future research efforts are focused on CECs with elevated risks for offsite contamination or plant accumulation. Irrigating specific crops such as feed crops and fruit trees may be a viable option to further minimize potential plant accumulation under field conditions. To promote the beneficial reuse of RW in agriculture, it is essential to understand the human health and ecological risks imposed by CEC mixtures and metabolites.
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Roman S, Guragai N, Ashkar H, Hurtado V, Kaur P, Vasudev R, Virk H, Shamoon FE. MYSTERIOUS LEFT VENTRICULAR OUTFLOW MOBILE MASS BEFORE TRANSCATHETER AORTIC VALVE REPLACEMENT (TAVR). J Am Coll Cardiol 2022. [DOI: 10.1016/s0735-1097(22)03836-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kaur J, Kamboj K, Kaur P, Jose Kakkanattu T, Sethi J, Singh Kohli H, Kumar V, Kumar Yadav A. POS-171 MYO-INOSITOL OXYGENASE (MIOX) & YES-ASSOCIATED PROTEIN (YAP) IN COMMUNITY ACQUIRED ACUTE KIDNEY INJURY. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.186] [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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SHARMA A, Kaur P, Kumar V, Kamboj K, Gondil V, Yadav A, Kohli H, Jha V. POS-426 CLINICAL TRIAL DATABASE (CTD): INTEGRATED DATABASE MANAGEMENT SYSTEM FOR CLINICAL TRIALS. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Mohammad Rafiei M, Parsaei S, Kaur P, Singh KJ, Büyükyıldız M, Kurudirek M. A Monte Carlo investigation of some important radiation parameters and tissue equivalency for photons below 1 keV in human tissues. Biomed Phys Eng Express 2022; 8. [PMID: 34902852 DOI: 10.1088/2057-1976/ac428f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 12/13/2021] [Indexed: 11/11/2022]
Abstract
The attenuation coefficients are important input values in estimating not only the dose and exposure in radiotherapy and medical imaging, but also in the proper design of photon shields. While studies are widely available above 1 keV, the attenuation coefficients of human tissues for photon energies less than 1 keV have not been studied yet. In this study, the attenuation coefficients of water and some human tissues were estimated for low energy photons using the MCNP6.1 code in the energy region 0.1 keV-1 keV. Mass attenuation coefficients were estimated at photon energies of 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950 and 1000 eV for water and ten human tissues (Soft, Breast, Lung, Bone, Brain, Eye lens, Ovary, Skin, Thyroid and Prostate). Results were compared with those available in literature and a fairly good agreement has been obtained. These data were then used to calculate the mean free path, half value layer, tenth value layer, effective atomic number and specific gamma-ray constant (useful for calculation of dose rate) as well. Moreover, for comparison the effective atomic number of the water has been obtained using the results of this work and using the data available in NIST database from 0.1 to 1 keV. In addition, the human tissues were compared with some tissue equivalent materials in terms of effective atomic number and specific gamma-ray constant to study the tissue equivalency from the results, the muscle-equivalent liquid with sucrose has been found to be the best tissue equivalent material for soft tissue, eye lens and brain with relative difference below 4.1%.
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Singh B, Khan N, Kaur P, Maroules M. Paroxysmal nocturnal hemoglobinuria clone in a patient with acute promyelocytic leukemia. J Cancer Res Ther 2022; 18:294-296. [DOI: 10.4103/jcrt.jcrt_1176_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Jaiswal V, Brar APS, Sandhu BS, Singla LD, Narang D, Leishangthem GD, Kaur P. Comparative evaluation of various diagnostic techniques for detection of Cryptosporidium infection from the faecal samples of diarrhoeic bovine calves. IRANIAN JOURNAL OF VETERINARY RESEARCH 2022; 23:247-254. [PMID: 36425600 PMCID: PMC9681974 DOI: 10.22099/ijvr.2022.42714.6204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/23/2022] [Accepted: 04/19/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Cryptosporidium, an opportunistic, zoonotic, apicomplexan parasite, is one of the most common causes of diarrhea in neonatal bovine calves around the globe. Bovine calves act as a major source of infection by excreting huge numbers of highly resistant oocysts in faeces, which can survive for a long time in extreme environmental conditions. As low as ten oocysts can cause disease and mortality, leading to the requirement of an early and accurate diagnosis for proper and favorable prognosis, management, and control. AIMS The current study was conducted with the objective to evaluate various diagnostic techniques (acid fast staining, negative staining, fluorescent, ELISA, PCR, nested PCR, and qPCR) for the detection of Cryptosporidium in the faecal samples of diarrheic bovine calves. METHODS Two hundred diarrheic faecal samples from bovine calves were collected and subjected to these techniques for Cryptosporidium diagnosis. Results of these were evaluated for diagnostic comparison. RESULTS Out of 200 faecal samples evaluated, 24% (48/200) were detected positive for Cryptosporidium using a combination of two techniques as gold standard criteria. Cohen's kappa value indicated moderate to almost perfect agreement (0.616 to 0.986) among all the techniques used in the present study. Leishman staining showed the lowest sensitivity (54.17%), while nested PCR and qPCR showed the highest sensitivity (97.92%). Diagnostic specificity of all these tests ranged from 98.68 to 100%. CONCLUSION Auramine stain was used for the first time in the bovine calves in India for the detection and diagnostic comparison of Cryptosporidium. It showed strong agreement with the molecular as well as classical diagnostic techniques, and can be used for primary screening for better diagnosis.
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Javed R, Narang D, Kaur P, Chandra M, Filia G, Singh ST. A fluorescence polarization assay using recombinant protein ESAT-6 for the detection of antibodies against pathogenic Mycobacterium bovis in bovine. IRANIAN JOURNAL OF VETERINARY RESEARCH 2022; 23:204-209. [PMID: 36425598 PMCID: PMC9681983 DOI: 10.22099/ijvr.2022.38558.5613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 03/07/2022] [Accepted: 03/16/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Bovine tuberculosis (bTB) is a major bacterial disease that causes significant economic disruption across the globe. AIMS Our study was based on using a fluorescence polarization assay (FPA) that used fluorescein-labeled ESAT-6 protein to detect Mycobacterium bovis antibodies in bovine serum. METHODS The ESAT-6 protein was used in a FPA. Positive TB reactors were determined by the comparative intradermal test (CID) and interferon gamma test (IFN-γ). Antibodies against M. bovis were detected using a fluorescein isothiocyanate (FITC) labeled tracer and a whole culture FITC labeled tracer in the positive cattle. RESULTS Of the 192 animals tested for bTB, 37 were found to be positive by either the CID or IFN-γ assays. Using the mP values from five culture-positive serum samples, a cutoff value of more than >127 mp provided the best discrimination between positive reactors and negative bTB animals. The ESAT-6 results of FPA in comparison with CID results revealed sensitivity of 92.9% and specificity of 64.6%, and in comparison with results IFN-γ, showed sensitivity of 95.7% and specificity of 49%. FPA using FITC labelled ESAT-6 as a tracer has better sensitivity (95.7%) and specificity (49.1%) than IFN-γ test in humoral immune response in animals. CONCLUSION This work revealed that the ESAT-6 protein as an antigen can be used in diagnosing bTB using a practical and sensitive humoral test.
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Kundra T, Kaur P. Role of inhaled levosimendan in peripartum cardiomyopathy. Saudi J Anaesth 2022; 16:500-503. [PMID: 36337420 PMCID: PMC9630672 DOI: 10.4103/sja.sja_297_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/12/2022] [Indexed: 11/12/2022] Open
Abstract
Levosimendan is an inodilator agent, which was initially widely used in low contractility states. However, its use has been restricted because of the invariable need to use a vasoconstrictor like norepinephrine, since it causes a marked fall in systemic vascular resistance (SVR). Hence its beneficial effects on the heart are compromised by the excessive fall in SVR. The inhalational route provides a better opportunity to exploit the positive cardiac effects, with a minimal effect on SVR. In this case report, we present a postpartum patient presenting with heart failure, in which inhalational levosimendan improved the hemodynamics and cardiac function, which was associated with relief of symptoms, with no need for other inotropes. As per our knowledge and extensive literature search, this is the first documented use of inhaled levosimendan in peripartum cardiomyopathy.
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Kaur P, Barnes R, Pan H, Detwiler AC, Liu M, Mahn C, Hall J, Messenger Z, You C, Piehler J, Smart R, Riehn R, Opresko PL, Wang H. TIN2 is an architectural protein that facilitates TRF2-mediated trans- and cis-interactions on telomeric DNA. Nucleic Acids Res 2021; 49:13000-13018. [PMID: 34883513 PMCID: PMC8682769 DOI: 10.1093/nar/gkab1142] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 12/08/2021] [Indexed: 12/23/2022] Open
Abstract
The telomere specific shelterin complex, which includes TRF1, TRF2, RAP1, TIN2, TPP1 and POT1, prevents spurious recognition of telomeres as double-strand DNA breaks and regulates telomerase and DNA repair activities at telomeres. TIN2 is a key component of the shelterin complex that directly interacts with TRF1, TRF2 and TPP1. In vivo, the large majority of TRF1 and TRF2 are in complex with TIN2 but without TPP1 and POT1. Since knockdown of TIN2 also removes TRF1 and TRF2 from telomeres, previous cell-based assays only provide information on downstream effects after the loss of TRF1/TRF2 and TIN2. Here, we investigated DNA structures promoted by TRF2-TIN2 using single-molecule imaging platforms, including tracking of compaction of long mouse telomeric DNA using fluorescence imaging, atomic force microscopy (AFM) imaging of protein-DNA structures, and monitoring of DNA-DNA and DNA-RNA bridging using the DNA tightrope assay. These techniques enabled us to uncover previously unknown unique activities of TIN2. TIN2S and TIN2L isoforms facilitate TRF2-mediated telomeric DNA compaction (cis-interactions), dsDNA-dsDNA, dsDNA-ssDNA and dsDNA-ssRNA bridging (trans-interactions). Furthermore, TIN2 facilitates TRF2-mediated T-loop formation. We propose a molecular model in which TIN2 functions as an architectural protein to promote TRF2-mediated trans and cis higher-order nucleic acid structures at telomeres.
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Kaur P, Chaudhry C, Panigrahi I, Srivastava P, Kaur A. Gas Chromatography Mass Spectrometry Aided Diagnosis of Glutathione Synthetase Deficiency. Lab Med 2021; 53:e59-e61. [PMID: 34791353 DOI: 10.1093/labmed/lmab084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Glutathione synthetase (GSS) deficiency is a rare disorder, occurring with a frequency of less than 1 in 100,000 individuals worldwide. The clinical presentation may vary from mild to severe, and manifestations include hemolytic anemia, hyperbilirubinemia, metabolic acidosis, neurological problems, and sepsis. Herein, we present a case of a newborn boy with the most severe phenotype of GSS deficiency, diagnosed based on clinical features and increased urinary 5-oxoproline levels determined via gas chromatography mass spectrometry (GCMS) testing.
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Kaur P, Chaudhry C, Kaur A, Panigrahi I, Srivastava P. Case Studies of Two Classical Imprinting Growth Disorders: Silver–Russell and Beckwith–Wiedemann Syndromes. J Pediatr Genet 2021. [DOI: 10.1055/s-0041-1739388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractThe genetic influences on human growth are being increasingly deciphered. Silver–Russell and Beckwith–Wiedemann syndromes (SRS; BWS) are two relatively common genetic syndromes with under- and overgrowth-related issues being the reason for referral. Aberration in genomic imprinting is the underlying genetic pathomechanism behind these syndromes. Herein, we described a series of children with these two growth disorders and give an orientation to the reader of the concept of imprinting as well as the genetic testing strategy and counseling to be offered in these syndromes.
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Quraishi A, Kaur P, Singh Sharma N, Arora AK. Antibiotic sensitivity patterns in Staphylococcus spp. isolated from goat milk in association with molecular detection of antibiotic resistance genes. IRANIAN JOURNAL OF VETERINARY RESEARCH 2021; 22:239-243. [PMID: 34777526 DOI: 10.22099/ijvr.2021.38465.5599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 05/28/2021] [Accepted: 06/25/2021] [Indexed: 09/30/2022]
Abstract
Background Microbes become unresponsive to the drugs used to treat infections due to their ability to acquire antimicrobial resistance. Aims The present research aimed to study the patterns of phenotypic and genotypic antimicrobial resistance in Staphylococcus spp. isolated from goat milk. Methods A total of 200 milk samples were collected to isolate Staphylococcus spp. from mastitic and healthy goats from Punjab state, India. The isolates were then identified biochemically and molecularly (polymerase chain reaction (PCR)). An antibiotic sensitivity test was conducted using 15 different antibiotics. Molecular detection of antibiotic resistance genes was done using PCR. Chi-square test was done to study the association between genotypic and phenotypic resistance patterns among the isolates. Results A total of 47 Staphylococcus spp. were isolated of which 33 and 14 isolates were respectively coagulase positive and negative. The isolates phenotypically showed the highest resistance to Penicillin G (P) (91.4%). Methicillin resistant Staphylococcus aureus (MRSA) was found 56.25%. Amongst the antibiotic resistance genes, tetK (87.23%) was the most prevalent isolated gene followed by blaZ (85.10%), mecA (48.93%), and tetM (14.89%). Statistical analysis revealed that the genotypic and phenotypic resistance patterns were significantly associated with penicillin and methicillin (MET) resistances. Conclusion The high prevalence of antibiotic-resistant Staphylococcus spp., especially MRSA, in goat milk is of concern and needs to be addressed in this area.
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Bendaram S, Elkattawy S, Atif Masood Noori M, Fichadiya H, Ayad S, Kaur P, Pullatt R, Shamoon F. Management of Wolff-Parkinson-White syndrome in a patient with peripartum cardiomyopathy. J Community Hosp Intern Med Perspect 2021; 11:839-842. [PMID: 34804402 PMCID: PMC8604443 DOI: 10.1080/20009666.2021.1978155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 09/03/2021] [Indexed: 12/03/2022] Open
Abstract
Wolf-Parkinson-White (WPW) syndrome is a congenital heart condition in which the atrioventricular (AV) node is bypassed by an accessory pathway that connects the atria and ventricle directly along with symptoms of syncope or palpitations. WPW syndrome in patients with a history of peripartum cardiomyopathy (pregnancy-related cardiomyopathy) is associated with a high risk of morbidity and mortality secondary to failure of the pump and the conduction system of the heart. Management of these cases deals with arrhythmia and systolic heart failure, which becomes more challenging in pregnant patients as it requires treatment methods that minimize risks to the fetus. We report a case of a young female patient with WPW syndrome and peripartum cardiomyopathy presenting with symptomatic arrhythmias (tachycardia).
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Kaur P, Parashar A. A Systematic Literature Review of Blockchain Technology for Smart Villages. ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING : STATE OF THE ART REVIEWS 2021; 29:2417-2468. [PMID: 34720578 PMCID: PMC8549431 DOI: 10.1007/s11831-021-09659-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
According to the United Nations, Sustainable Development Goals are framed for improving rural health, hunger, poverty issues, environmental conditions, and illiteracy globally. With the upcoming technology, there have been many advances in the lifestyle of people all around the world. Comparatively, more emphasis has been given to the development of urban areas than rural. The sustainable development of a country depends on the growth of its rural areas. Countless technological and theoretical models, projects, and frameworks have been proposed and implemented to help overcome sundry issues and challenges faced by rural people in quotidian life. New technological methods are deemed to be the future of livability, therefore; a technologically advanced solution for sustainable rural development is called for. Blockchain Technology is the next step for innovation and development and it has far many applications in sustainable rural development that are yet to be discovered. The objective of this paper is to explicitly review research conducted in rural development to fill the undone work in the future with better research ideas, to make rural areas a livable and advanced place while also maintaining their integrity leading to sustainable development. To conduct such a review, a systematic research methodology is applied following regulations in the conduction of standardized but explorative analysis. Within the timeline of 2010-2021, 112 papers are carefully selected to perform the systematic review. This review will provide a comprehensible as well as concise research compendium for all applications proposed, implemented, and possible in the future to realize the concept of smart villages for the development of rural areas using blockchain technology.
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Kaur P, Chakraborty N, Juglan K, Kumar H, Singla M. Temperature dependent physicochemical studies propylene and hexylene glycols in methanol solutions of chlorhexidine. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kaur P, Pan H, Longley MJ, Copeland WC, Wang H. Using Atomic Force Microscopy to Study the Real Time Dynamics of DNA Unwinding by Mitochondrial Twinkle Helicase. Bio Protoc 2021; 11:e4139. [PMID: 34604445 DOI: 10.21769/bioprotoc.4139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/23/2021] [Accepted: 06/29/2021] [Indexed: 12/06/2022] Open
Abstract
Understanding the structure and dynamics of DNA-protein interactions during DNA replication is crucial for elucidating the origins of disorders arising from its dysfunction. In this study, we employed Atomic Force Microscopy as a single-molecule imaging tool to examine the mitochondrial DNA helicase Twinkle and its interactions with DNA. We used imaging in air and time-lapse imaging in liquids to observe the DNA binding and unwinding activities of Twinkle hexamers at the single-molecule level. These procedures helped us visualize Twinkle loading onto and unloading from the DNA in the open-ring conformation. Using traditional methods, it has been shown that Twinkle is capable of unwinding dsDNA up to 20-55 bps. We found that the addition of mitochondrial single-stranded DNA binding protein (mtSSB) facilitates a 5-fold increase in the DNA unwinding rate for the Twinkle helicase. The protocols developed in this study provide new platforms to examine DNA replication and to explore the mechanism driving DNA deletion and human diseases. Graphic abstract: Mitochondrial Twinkle Helicase Dynamics.
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Saini A, Gupta P, Bansal P, Sharma RP, Krishan B, Kaur P, Ferretti V. SYNTHESES, CHARACTERIZATION, X-RAY STRUCTURAL DETERMINATION, AND PACKING ANALYSES OF TERNARY COPPER(II) COMPLEXES: [Cu(2-PHENOXYACETATE/4-CHLOROBENZOATE)2(TEMED)]. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621090080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pan H, Kaur P, Barnes R, Detwiler AC, Sanford SL, Liu M, Xu P, Mahn C, Tang Q, Hao P, Bhattaram D, You C, Gu X, Lu W, Piehler J, Xu G, Weninger K, Riehn R, Opresko PL, Wang H. Structure, dynamics, and regulation of TRF1-TIN2-mediated trans- and cis-interactions on telomeric DNA. J Biol Chem 2021; 297:101080. [PMID: 34403696 PMCID: PMC8437784 DOI: 10.1016/j.jbc.2021.101080] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 07/30/2021] [Accepted: 08/12/2021] [Indexed: 01/17/2023] Open
Abstract
TIN2 is a core component of the shelterin complex linking double-stranded telomeric DNA-binding proteins (TRF1 and TRF2) and single-strand overhang-binding proteins (TPP1-POT1). In vivo, the large majority of TRF1 and TRF2 exist in complexes containing TIN2 but lacking TPP1/POT1; however, the role of TRF1-TIN2 interactions in mediating interactions with telomeric DNA is unclear. Here, we investigated DNA molecular structures promoted by TRF1-TIN2 interaction using atomic force microscopy (AFM), total internal reflection fluorescence microscopy (TIRFM), and the DNA tightrope assay. We demonstrate that the short (TIN2S) and long (TIN2L) isoforms of TIN2 facilitate TRF1-mediated DNA compaction (cis-interactions) and DNA-DNA bridging (trans-interactions) in a telomeric sequence- and length-dependent manner. On the short telomeric DNA substrate (six TTAGGG repeats), the majority of TRF1-mediated telomeric DNA-DNA bridging events are transient with a lifetime of ~1.95 s. On longer DNA substrates (270 TTAGGG repeats), TIN2 forms multiprotein complexes with TRF1 and stabilizes TRF1-mediated DNA-DNA bridging events that last on the order of minutes. Preincubation of TRF1 with its regulator protein Tankyrase 1 and the cofactor NAD+ significantly reduced TRF1-TIN2 mediated DNA-DNA bridging, whereas TIN2 protected the disassembly of TRF1-TIN2 mediated DNA-DNA bridging upon Tankyrase 1 addition. Furthermore, we showed that TPP1 inhibits TRF1-TIN2L-mediated DNA-DNA bridging. Our study, together with previous findings, supports a molecular model in which protein assemblies at telomeres are heterogeneous with distinct subcomplexes and full shelterin complexes playing distinct roles in telomere protection and elongation.
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Jain A, Kaur P, Juglan KC. Rheological Study of Reduced Graphene Oxide–Ethylene Glycol Nanosuspension for Ink. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421080136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh B, Kaur P, Mekheal EM, Fasulo S, Maroules M. COVID-19 and thrombotic thrombocytopenic purpura: a review of literature. Hematol Transfus Cell Ther 2021; 43:529-531. [PMID: 34368627 PMCID: PMC8324406 DOI: 10.1016/j.htct.2021.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/21/2021] [Indexed: 01/07/2023] Open
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Singh B, Kaur P, Gupta S, Guragai N, Maroules M. Complete Response With Immunotherapy: A Case of Metastatic Bladder Cancer. J Investig Med High Impact Case Rep 2021; 9:23247096211035603. [PMID: 34308703 PMCID: PMC8317233 DOI: 10.1177/23247096211035603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Bladder cancer is the most common urinary tract malignancy. Platinum-based chemotherapy is the first line of treatment in locally advanced or metastatic bladder cancer. Immunotherapy has become a novel therapy option in a broad variety of malignancies including bladder cancer. Immunotherapy is approved as first line of treatment in patients who are ineligible for platinum-based chemotherapy and second-line treatment for metastatic urothelial cancer who progressed after platinum-based treatments. We present the case of an 83-year-old female with metastatic bladder cancer who was chemotherapy ineligible and had complete response with immune checkpoint inhibitor pembrolizumab.
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Panigrahi I, Bhatt Y, Malik S, Kaur P, Kaur A. Clinical Profile of Indian Children with Down Syndrome. J Pediatr Genet 2021; 12:53-57. [PMID: 36684542 PMCID: PMC9848754 DOI: 10.1055/s-0041-1732475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 06/15/2021] [Indexed: 01/25/2023]
Abstract
This retrospective study was performed on 208 patients with Down syndrome (DS) from heterogeneous ethnic population and admitted under Genetics Metabolic Unit. The aim of the study was to look for phenotypic variability and associated complications in children and adolescents with DS. The average age of the evaluated DS patients was 34 months. Cardiac anomalies were found in 128 (62%) of the 208 cases. Among the cardiac disorders, atrial septal defects accounted for 30% of cases. Other complications observed were hypothyroidism and developmental delay in around 31% cases and neonatal cholestasis in 14% cases. Also, we report two cases with Moya-Moya disease and one case with atlanto-axial dislocation.
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Kaur P, Santana M, Singh B, Sah A, Pullatt R, Shamoon F. Misoprostol-induced Coronary Vasospasm Complicated by Takotsubo Cardiomyopathy and Cardiac Arrest. Eur J Case Rep Intern Med 2021; 8:002674. [PMID: 34268275 PMCID: PMC8276929 DOI: 10.12890/2021_002674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 06/03/2021] [Indexed: 11/08/2022] Open
Abstract
Misoprostol is a synthetic E1 prostaglandin commonly used to induce abortion in the United States and elsewhere. There is limited literature on the cardiovascular adverse effects of misoprostol, and, to the best of our knowledge, very few such events have been reported. We describe the case of 52-year-old woman who was given misoprostol for cervical softening before endometrial ablation and experienced a cardiac arrest due to coronary vasospasm. She was successfully resuscitated and echocardiography showed features consistent with Takotsubo cardiomyopathy. Coronary angiography revealed coronary artery spasm which responded to nitroglycerin. Our case adds to the limited literature on this life-threatening adverse event of misoprostol.
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Chaudhry C, Kaur P, Srivastava P, Panigrahi I, Kaur A. Novel variation in ANTXR2 gene causing hyaline fibromatosis syndrome: A report from India. Congenit Anom (Kyoto) 2021; 61:140-141. [PMID: 33724566 DOI: 10.1111/cga.12414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/01/2021] [Accepted: 03/03/2021] [Indexed: 11/27/2022]
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