Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 140
Filter
1.
Int J Psychophysiol ; 184: 20-27, 2023 02.
Article in English | MEDLINE | ID: mdl-36513183

ABSTRACT

There is growing evidence of beneficial effects of mindfulness developed through engaging in mindfulness training/practices on sensory and cognitive processing, emotion regulation and mental health. Mindfulness has also been conceptualised as a dispositional 'trait', i.e. the naturally-occurring ability of meditation-naïve individuals to display, in varying degree, a non-judgmental non-reactive present-moment awareness in everyday life. In this study we examined possible associations between dispositional mindfulness, alexithymia and sensory processing. Eye-blink startle responses to acoustic stimuli of varying intensity [90-dB or 100-dB over 70-dB (A) background] were assessed in 26 meditation-naïve adults (50 % men) using electromyographic recordings of the orbicularis muscle. All participants completed the Five Facet Mindfulness Questionnaire and the 20-item Toronto Alexithymia Scale. A negative association was found between dispositional mindfulness and alexithymia (r = -0.513). There was stronger startle habituation to 100-dB, compared to 90-dB probes. Stronger startle habituation (larger negative habitation slope values) to 100-dB probes was significantly associated with higher dispositional mindfulness (r = -0.528) and with lower alexithymia at trend level (r = 0.333). As indicated by commonality analysis, 10.6 % of explained variance in habituation (100-dB probes) was common to both alexithymia and mindfulness, 17.3 % was unique to mindfulness, but alexithymia made negligible unique contribution (0.5 %). These findings indicate similar startle habituation pattern in people with a high level of dispositional mindfulness to that reported previously by Antonova et al. (2015) in people with moderate mindfulness meditation practice intensity. Future studies should investigate the mechanisms, such as interoceptive awareness, that might underly these relationships.


Subject(s)
Mindfulness , Reflex, Startle , Adult , Male , Humans , Female , Reflex, Startle/physiology , Affective Symptoms , Habituation, Psychophysiologic , Perception
2.
Theriogenology ; 172: 193-199, 2021 Sep 15.
Article in English | MEDLINE | ID: mdl-34246165

ABSTRACT

The effect of simulated physiological oocyte maturation on the developmental competence, reactive oxygen species production and apoptosis rate of in vitro produced goat embryos were studied in the present experiment. Oocytes and spermatozoa were recovered from ovaries and epididymis, respectively, procured from a local small animal abattoir. The oocytes aspirated from the ovaries were allocated into two groups, control (subjected to routine in vitro maturation, fertilization and culture) and simulated physiological oocyte maturation (SPOM) group (subjected to prematuration, followed by routine in vitro maturation, fertilization and culture). The SPOM group showed a significantly (p < 0.05) higher maturation and blastocyst rates (90.60 ± 0.46% and 29.09 ± 2.59%, respectively) as compared to the control group (85.29 ± 0.98% and 24.09 ± 1.08%). The intensity of reactive oxygen species of the embryos in the control group (14.98 ± 0.83 pixels/embryo) was significantly (p < 0.05) higher than the SPOM group (9.60 ± 0.76 pixels/embryo). The apoptosis rate was also significantly (p < 0.05) higher in the embryos of the control group (9.18 ± 1.07%) as compared to the SPOM group (5.71 ± 0.90%). In conclusion, the simulated physiological oocyte maturation system significantly increases the developmental competence of the oocytes and decreases the intensity of reactive oxygen species and embryonic apoptosis in abattoir derived goat embryos.


Subject(s)
Goats , In Vitro Oocyte Maturation Techniques , Animals , Blastocyst , Embryonic Development , Fertilization in Vitro/veterinary , In Vitro Oocyte Maturation Techniques/veterinary , Oocytes
3.
Am J Otolaryngol ; 42(5): 103146, 2021.
Article in English | MEDLINE | ID: mdl-34171529

ABSTRACT

PURPOSE: 30-day hospital readmissions after head and neck cancer surgery continue to be a significant source of patient harm and healthcare expenditure. While there is substantial data in the literature assessing predictive factors for readmissions after head and neck cancer surgery, there are a paucity of studies which attempt to understand if such readmissions are preventable. The goal of this paper is to determine factors associated with 30-day hospital readmissions after head and neck cancer surgery and to understand if these readmissions were preventable. MATERIALS AND METHODS: Retrospective review from a single academic tertiary care center. Patients readmitted within 30 days after undergoing surgery for cancers of the head and neck between 2015 and 2018 were identified. RESULTS: Over a 3-year period, 26 patients undergoing resection with or without reconstruction of head and neck cancers were readmitted to the hospital within 30 days of discharge. There were 15 (58%) men and 11 (42%) women with a mean age of 68 years (SD 14 years). Twenty-one (81%) patients had squamous cell carcinoma and 13 (50%) had a primary site in the oral cavity. Thirteen (50%) had undergone free or regional flap reconstruction. The indication for readmission was related to the surgical wound in 19 (73%) and to medical complications in 7 (27%). Each case was categorized as "possibly preventable" versus "uncertain if preventable" based on whether a reasonable and feasible change in management may have prevented readmission. Six (23%) readmissions were deemed possibly preventable. Four were related to the surgical wound where initial free or regional flaps may have prevented complication. Two were medical complications that may have benefited from longer inpatient observation. CONCLUSIONS: For a subset of patients readmitted within 30 days of head and neck cancer surgery, a reasonable and feasible change in management may have prevented their hospital readmission. The significance of better understanding this patient population is underscored by the high mortality rate.


Subject(s)
Head and Neck Neoplasms/surgery , Patient Readmission , Squamous Cell Carcinoma of Head and Neck/surgery , Aged , Aged, 80 and over , Female , Forecasting , Health Expenditures , Humans , Male , Middle Aged , Monitoring, Physiologic , Patient Readmission/economics , Patient Readmission/statistics & numerical data , Postoperative Complications/prevention & control , Plastic Surgery Procedures , Surgical Flaps , Surgical Wound Infection/prevention & control
4.
J Synchrotron Radiat ; 26(Pt 5): 1797-1807, 2019 Sep 01.
Article in English | MEDLINE | ID: mdl-31490172

ABSTRACT

Flame-retardant polyurethane foams are potential packing materials for the transport casks of highly active nuclear materials for shock absorption and insulation purposes. Exposure of high doses of gamma radiation causes cross-linking and chain sectioning of macromolecules in this polymer foam, which leads to reorganization of their cellular microstructure and thereby variations in physico-mechanical properties. In this study, in-house-developed flame-retardant rigid polyurethane foam samples were exposed to gamma irradiation doses in the 0-20 kGy range and synchrotron radiation X-ray micro-computed tomography (SR-µCT) imaging was employed for the analysis of radiation-induced morphological variations in their cellular microstructure. Qualitative and quantitative analysis of SR-µCT images has revealed significant variations in the average cell size, shape, wall thickness, orientations and spatial anisotropy of the cellular microstructure in polyurethane foam.


Subject(s)
Flame Retardants/radiation effects , Polyurethanes/radiation effects , X-Ray Microtomography/methods , Gamma Rays , Materials Science/methods , Radiation Dosage , Synchrotrons
5.
J Pediatr Urol ; 15(4): 374.e1-374.e5, 2019 Aug.
Article in English | MEDLINE | ID: mdl-31229415

ABSTRACT

BACKGROUND: The male genital examination is a common source of discomfort for the patient and medical provider. Performance of male genital examination is imperative; however, as many treatable diagnoses can be made. Undescended testicles (UDTs), hernias, testicular tumors, and urethral abnormalities are all potentially concerning findings which can be discovered on routine examination. OBJECTIVE: The objectives of this study are to determine the rate at which general pediatricians perform routine genitourinary (GU) examinations in the pediatric population and to determine the rate at which UDT are diagnosed or documented in the patient's history. The authors hypothesize the rate of pediatric GU examination during routine well-child visits to be in line with the previously reported rates in the adult literature. STUDY DESIGN: Nine hundred ninety-six consecutive male well-child visits conducted by general pediatricians at the study institution were reviewed. These visits were evaluated for documentation of a detailed GU examination as well as the presence of UDT from these examinations. In addition, past medical and surgical histories were reviewed to determine if a diagnosis of UDT was noted. RESULTS: Pediatricians at the study institution documented GU examinations 99.1% of the time during male well-child visits. Only 1.1% of the cohort had a documentation of UDT at any time point. Of the 11 patients with UDT, 6 boys (54.5%) had spontaneous descent with no referral to urology, whereas 5 (45.5%) required orchidopexy. DISCUSSION: Prior reports suggest 70-75% of routine office visits include a genital examination. None of these reports reviewed the pediatric population, thus making this review novel in this respect. In addition, the results are vastly different from these prior studies as the authors demonstrated over 99% of male well-child examinations included documentation of a thorough genital examination. A limitation of the study is its retrospective nature, which creates a lack of standardization across the data set. In addition, without being physically present in the examination room, one cannot discern whether an examination is simply being documented without actual performance because of the template format of the electronic medical record (EMR). Furthermore, the study was not designed to best evaluate the true rate of UDTs; therefore, the reported rate of 1.1% cannot be accurately associated with a particular age at diagnosis. CONCLUSIONS: Pediatricians do, in fact, document GU examinations on a routine basis. This finding cannot be taken with complete certainty as verification of actual examination performance is impractical. While the data demonstrated a lower than expected rate of UDT, depending upon age at diagnosis, this could indicate that although examinations are being documented, their accuracy may be diminished because of various factors at play in the healthcare system as a whole, including improper exam performance and EMR templates. Follow-up studies are required to verify these potentially changing rates of UDT and to determine if there is discordance between documentation and performance of GU examinations.


Subject(s)
Attitude of Health Personnel , Child Health , Pediatricians/statistics & numerical data , Physical Examination/statistics & numerical data , Urogenital System/anatomy & histology , Adolescent , Child , Child, Preschool , Cohort Studies , Databases, Factual , Documentation/statistics & numerical data , Genitalia, Male/anatomy & histology , Hospitals, Pediatric , Humans , Incidence , Infant , Male , Outcome Assessment, Health Care , Physical Examination/methods , Practice Patterns, Physicians' , Retrospective Studies , Tertiary Care Centers , United States
7.
Epidemiol Infect ; 145(13): 2656-2665, 2017 10.
Article in English | MEDLINE | ID: mdl-28768557

ABSTRACT

Influenza A(H1N1) viruses of the 2009 pandemic (A(H1N1)pdm09) continue to cause outbreaks in the post-pandemic period. During January to May 2015, an upsurge of influenza was recorded that resulted in high fatality in central India. Genetic lineage, mutations in the hemagglutinin (HA) gene and infection by quasi-species are reported to affect disease severity. The objective of this study is to present the molecular and epidemiological trends during the 2015 influenza outbreak in central India. All the referred samples were subjected to qRT-PCR for diagnosis. HA gene sequencing (23 survivors and 24 non-survivors) and cloning were performed and analyzed using Molecular Evolutionary Genomic Analyzer (MEGA 5·05). Of the 3625 tested samples, 1607 (44·3%) were positive for influenza A(H1N1)pdm09, of which 228 (14·2%) individuals succumbed to death. A significant trend was observed in positivity (P = 0·003) and mortality (P < 0·0001) with increasing age. The circulating A(H1N1)pdm09 virus was characterized as belonging to clade-6B. Clinically significant mutations were detected. Patients infected with the quasi-species of the virus had a greater risk of death (P = 0·009). This study proposes a robust molecular and clinical surveillance program for the detection and characterization of the virus, along with prompt treatment protocols to prevent outbreaks.


Subject(s)
Disease Outbreaks , Hemagglutinin Glycoproteins, Influenza Virus/genetics , Influenza A Virus, H1N1 Subtype/physiology , Influenza, Human/epidemiology , Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Female , Hemagglutinin Glycoproteins, Influenza Virus/metabolism , Humans , India/epidemiology , Infant , Influenza A Virus, H1N1 Subtype/genetics , Influenza, Human/virology , Male , Middle Aged , Sequence Analysis, RNA , Young Adult
8.
Sci Rep ; 7(1): 7114, 2017 08 02.
Article in English | MEDLINE | ID: mdl-28769110

ABSTRACT

Tolerance to Dutch elm disease (DED) has been linked to the rapid and/or high induction of disease-responsive genes after infection with the fungus Ophiostoma novo-ulmi. Although the fungal infection by O. novo-ulmi primarily takes places in xylem vessels, it is still unclear how xylem contributes to the defense against DED. Taking advantage of the easy separation of wood and bark tissues in young American elm saplings, here we show that most disease-responsive genes exhibited higher expression in wood compared to bark tissues after fungal infection. On the other hand, the stress-related phytohormones were generally more abundant in the bark compared to wood tissues. However, only endogenous levels of jasmonates (JAs), but not salicylic acid (SA) and abscisic acid (ABA) increased in the inoculated tissues. This, along with the upregulation of JA-biosynthesis genes in inoculated bark and core tissues further suggest that phloem and xylem might contribute to the de novo biosynthesis of JA after fungal infection. The comparison between two tolerant elm varieties, 'Valley Forge' and 'Princeton,' also indicated that tolerance against DED might be mediated by different mechanisms in the xylem. The present study sheds some light on the amplitude and kinetics of defense responses produced in the xylem and phloem in response to DED.


Subject(s)
Disease Resistance/genetics , Plant Bark/metabolism , Plant Diseases/genetics , Ulmus/genetics , Ulmus/metabolism , Wood/metabolism , Fungi/genetics , Gene Expression Profiling , Gene Expression Regulation, Plant , Genes, Fungal , Genotype , Host-Pathogen Interactions/genetics , Organ Specificity , Plant Diseases/microbiology , Ulmus/microbiology
9.
Environ Sci Process Impacts ; 19(3): 388-394, 2017 Mar 22.
Article in English | MEDLINE | ID: mdl-28079226

ABSTRACT

Alkaline hydrolysis of RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), as one of the most promising methods for nitrocompound remediation, was investigated computationally at the PCM(Pauling)/M06-2X/6-311++G(d,p) level of theory. Computational simulation shows that RDX hydrolysis is a highly exothermic multistep process involving initial deprotonation and nitrite elimination, cycle cleavage, further transformation of cycle-opened intermediates to end products caused by a series of C-N bond ruptures, hydroxide attachments, and proton transfers. Computationally predicted products of RDX hydrolysis such as nitrite, nitrous oxide, formaldehyde, formate, and ammonia correspond to experimentally observed ones. Accounting of specific hydration of hydroxide is critical to create an accurate kinetic model for alkaline hydrolysis. Simulated kinetics of the hydrolysis are in good agreement with available experimental data. A period of one month is necessary for 99% RDX decomposition at pH 10. Computations predict significant increases of the reaction rate of hydrolysis at pH 11, pH 12, and pH 13.


Subject(s)
Computer Simulation , Models, Chemical , Triazines/chemistry , Ammonia/chemistry , Environmental Restoration and Remediation , Formaldehyde/chemistry , Formates/chemistry , Hydrogen-Ion Concentration , Hydrolysis , Kinetics , Nitrites/chemistry , Nitrous Oxide/chemistry
10.
J Thromb Haemost ; 15(2): 375-387, 2017 02.
Article in English | MEDLINE | ID: mdl-27925685

ABSTRACT

Essentials Platelet transfusion suffers from availability, portability, contamination, and short shelf-life. SynthoPlate™ (synthetic platelet technology) can resolve platelet transfusion limitations. SynthoPlate™ does not activate resting platelets or stimulate coagulation systemically. SynthoPlate™ significantly improves hemostasis in thrombocytopenic mice dose-dependently. SUMMARY: Background Platelet transfusion applications face severe challenges, owing to the limited availability and portability, high risk of contamination and short shelf-life of platelets. Therefore, there is significant interest in synthetic platelet substitutes that can provide hemostasis while avoiding these issues. Platelets promote hemostasis by injury site-selective adhesion and aggregation, and propagation of coagulation reactions on their membranes. On the basis of these mechanisms, we have developed a synthetic platelet technology (SynthoPlate™) that integrates platelet-mimetic site-selective 'adhesion' and 'aggregation' functionalities via heteromultivalent surface decoration of lipid vesicles with von Willebrand factor-binding, collagen-binding and active platelet integrin glycoprotein (GP) IIb-IIIa-binding peptides. Objective To evaluate SynthoPlate for its effects on platelets and plasma in vitro, and for systemic safety and hemostatic efficacy in severely thrombocytopenic mice in vivo. Methods In vitro, SynthoPlate was evaluated with aggregometry, fluorescence microscopy, microfluidics, and thrombin and fibrin generation assays. In vivo, SynthoPlate was evaluated for systemic safety with prothrombin and fibrin assays on plasma, and for hemostatic effects on tail-transection bleeding time in severely thrombocytopenic (TCP) mice. Results SynthoPlate did not aggregate resting platelets or spontaneously promote coagulation in plasma, but could amplify the recruitment and aggregation of active platelets at the bleeding site, and thereby site-selectively enhance fibrin generation. SynthoPlate dose-dependently reduced bleeding time in TCP mice, to levels comparable to those in normal mice. SynthoPlate has a reasonable circulation residence time, and is cleared mostly by the liver and spleen. Conclusion The results demonstrate the promise of SynthoPlate as a synthetic platelet substitute in transfusion treatment of platelet-related bleeding complications.


Subject(s)
Blood Platelets/cytology , Blood Substitutes , Platelet Adhesiveness , Thrombocytopenia/therapy , Animals , Bleeding Time , Blood Coagulation , Hemorrhage , Hemostasis , Humans , Light , Mice , Microfluidics , Microscopy, Electron, Scanning , Microscopy, Fluorescence , Platelet Transfusion , Scattering, Radiation , Thrombin/metabolism
11.
Sci Rep ; 6: 21934, 2016 Feb 23.
Article in English | MEDLINE | ID: mdl-26902398

ABSTRACT

Dutch elm disease (DED), caused by three fungal species in the genus Ophiostoma, is the most devastating disease of both native European and North American elm trees. Although many tolerant cultivars have been identified and released, the tolerance mechanisms are not well understood and true resistance has not yet been achieved. Here we show that the expression of disease-responsive genes in reactions leading to tolerance or susceptibility is significantly differentiated within the first 144 hours post-inoculation (hpi). Analysis of the levels of endogenous plant defense molecules such as jasmonic acid (JA) and salicylic acid (SA) in tolerant and susceptible American elm saplings suggested SA and methyl-jasmonate as potential defense response elicitors, which was further confirmed by field observations. However, the tolerant phenotype can be best characterized by a concurrent induction of JA and disease-responsive genes at 96 hpi. Molecular investigations indicated that the expression of fungal genes (i.e. cerato ulmin) was also modulated by endogenous SA and JA and this response was unique among aggressive and non-aggressive fungal strains. The present study not only provides better understanding of tolerance mechanisms to DED, but also represents a first, verified template for examining simultaneous transcriptomic changes during American elm-fungus interactions.


Subject(s)
Cyclopentanes/metabolism , Fungal Proteins/genetics , Ophiostoma/genetics , Oxylipins/metabolism , Plant Diseases/genetics , Plant Proteins/genetics , Ulmus/genetics , Acetates/immunology , Acetates/metabolism , Cyclopentanes/immunology , Disease Susceptibility , Fungal Proteins/metabolism , Gene Expression Regulation, Fungal , Gene Expression Regulation, Plant , Host-Pathogen Interactions , Immune Tolerance , Molecular Sequence Annotation , Ophiostoma/growth & development , Ophiostoma/pathogenicity , Oxylipins/immunology , Phenotype , Plant Diseases/immunology , Plant Diseases/microbiology , Plant Proteins/immunology , Salicylic Acid/immunology , Salicylic Acid/metabolism , Time Factors , Ulmus/immunology , Ulmus/microbiology , Virulence
12.
J Synchrotron Radiat ; 22(6): 1531-9, 2015 Nov.
Article in English | MEDLINE | ID: mdl-26524319

ABSTRACT

A full-field hard X-ray imaging beamline (BL-4) was designed, developed, installed and commissioned recently at the Indus-2 synchrotron radiation source at RRCAT, Indore, India. The bending-magnet beamline is operated in monochromatic and white beam mode. A variety of imaging techniques are implemented such as high-resolution radiography, propagation- and analyzer-based phase contrast imaging, real-time imaging, absorption and phase contrast tomography etc. First experiments on propagation-based phase contrast imaging and micro-tomography are reported.

13.
Indian J Med Res ; 141(5): 584-90, 2015 May.
Article in English | MEDLINE | ID: mdl-26139775

ABSTRACT

BACKGROUND & OBJECTIVES: Dengue (DEN) is a rapidly spreading arboviral disease transmitted by Aedes mosquitoes. Although it is endemic in India, dengue virus (DENV) infection has not been reported from tribal areas of Madhya Pradesh. Investigations were conducted to establish the aetiology of sudden upsurge of cases with febrile illness in June 2013 from tribal villages of Mandla district of Madhya Pradesh, India. METHODS: The rapid response team of the National Institute for Research in Tribal Health, Jabalpur, conducted clinical investigations and field surveys to collect the samples from suspected cases. Samples were tested using molecular and serological tools. Collected mosquitoes were identified and tested for the presence of virus using semi nested reverse transcriptase-polymerase chain reaction (nRT-PCR). The sequences were analysed to identify serotype and genotype of the virus. RESULTS: Of the 648 samples collected from 18 villages of Mandla, 321 (49.53%) were found to be positive for dengue. The nRT-PCR and sequencing confirmed the aetiology as dengue virus type 2. Eighteen per cent of patients needed hospitalization and five deaths were attributed to dengue. The virus was also detected from Aedes aegypti mosquito, which was incriminated as a vector. Phylogenetic analysis revealed that the dengue virus 2 detected belonged to cosmopolitan genotype of the virus. INTERPRETATION & CONCLUSIONS: Dengue virus serotype 2 was detected as the aetiological agent in the outbreak in tribal villages of Mandla district of Madhya Pradesh. Conducive man-made environment favouring mosquitogenic conditions and seeding of virus could be the probable reasons for this outbreak. Urgent attention is needed to control this new threat to tribal population, which is already overburdened with other vector borne diseases.


Subject(s)
Dengue Virus/genetics , Dengue/epidemiology , Phylogeny , Population Groups , Dengue/blood , Dengue/genetics , Dengue Virus/isolation & purification , Disease Outbreaks , Female , Humans , Immunoglobulin M/blood , India/epidemiology , Male , Serogroup
14.
Protoplasma ; 252(3): 925-31, 2015 May.
Article in English | MEDLINE | ID: mdl-25359187

ABSTRACT

This study describes a protocol for regeneration of plants from cell suspension-derived protoplasts of American elm (Ulmus americana). Efficient protoplast isolation was achieved from a two-phase culture system through the incorporation of 100 µM 2-aminoindan-2-phosphonic acid, with a yield of approximately 2 × 10(6) protoplasts/ml packed cell volume. Isolated protoplasts failed to survive in liquid or alginate bead culture systems but initiated and continued to divide when embedded in low melting point agarose beads. Protoplast-derived callus proliferated and differentiated into shoot buds in response to 10 or 20 µM thidiazuron. Differentiated buds elongated and continued to proliferate on elm shoot medium supplemented with 3.0 µM GA3. The protoplast-derived shoots rooted and acclimatized to greenhouse conditions and continued to grow. This system provides the first protoplast-to-plant regeneration system for American elm and provides a framework for the development of protoplast fusion or genome editing technologies.


Subject(s)
Protoplasts/physiology , Regeneration , Ulmus/physiology , Acclimatization , Plant Roots/physiology , Plant Shoots/growth & development , Tissue Culture Techniques
15.
Epidemiol Infect ; 143(2): 412-8, 2015 Jan.
Article in English | MEDLINE | ID: mdl-24667083

ABSTRACT

Dengue is regarded as the most important arboviral disease. Although sporadic cases have been reported, serotypes responsible for outbreaks have not been identified from central India over the last 20 years. We investigated two outbreaks of febrile illness, in August and November 2012, from Korea district (Chhattisgarh) and Narsinghpur district (Madhya Pradesh), respectively. Fever and entomological surveys were conducted in the affected regions. Molecular and serological tests were conducted on collected serum samples. Dengue-specific amplicons were sequenced and phylogenetic analyses were performed. In Korea and Narsinghpur districts 37·3% and 59% of cases were positive, respectively, for dengue infection, with adults being the worst affected. RT-PCR confirmed dengue virus serotype 1 genotype III as the aetiology. Ninety-six percent of infections were primary. This is the first time that dengue virus 1 outbreaks have been documented from central India. Introduction of the virus into the population and a conducive mosquitogenic environment favouring increased vector density caused the outbreak. Timely diagnosis and strengthening vector control measures are essential to avoid future outbreaks.


Subject(s)
Dengue Virus/genetics , Dengue/epidemiology , Dengue/virology , Disease Outbreaks/statistics & numerical data , Adolescent , Adult , Aged , Child , Child, Preschool , Dengue Virus/classification , Dengue Virus/isolation & purification , Female , Genotype , Humans , India/epidemiology , Infant , Infant, Newborn , Male , Middle Aged , Phylogeny , Rural Population , Young Adult
16.
Fungal Genet Biol ; 71: 32-41, 2014 Oct.
Article in English | MEDLINE | ID: mdl-25139300

ABSTRACT

Dutch elm disease (DED), caused by ascomycete fungi in the Ophiostoma genus, is the most devastating disease of American elm (Ulmus americana) trees. Cerato ulmin (CU), a hydrophobin secreted by the fungus, has been implicated in the development of DED, but its role in fungal pathogenicity and virulence remains uncertain and controversial. Here, we describe reporter systems based on the CU promoter and three reporter proteins (GFP, GUS and LUC), developed as research tools for quantitative and qualitative studies of DED in vitro, in vivo and in planta. A strain of the aggressive species Ophiostoma novo-ulmi was transformed with the reporter constructs using Agrobacterium-mediated transformation and the fungal transformants, namely M75-GFP, M75-GUS and M75-LUC, were examined for mitotic stability after repeated subcultures. The intensity of GFP fluorescence was strong in M75-GFP spores and hyphae, allowing microscopic investigations of spore structure, fungal morphogenesis and fungal development. The interaction of M75-GFP and U. americana callus cells was explored with scanning laser confocal microscopy facilitating qualitative studies on fungal strategies for the invasion and penetration of elm cells. M75-GUS was generated to provide an invasive, yet quantitative approach to study fungal-plant interactions in vitro and in planta. The generation of M75-LUC transformants was aimed at providing a non-destructive quantitative approach to study the role of CU in vivo. The sensitivity, low background signal and linearity of LUC assays all predict a very reliable approach to investigate and re-test previously claimed roles of this CU in fungal pathogenicity. These reporter systems provide new tools to investigate plant-pathogen interactions in this complex pathosystem and may aid in better understanding the development of DED.


Subject(s)
Genes, Reporter , Ophiostoma/pathogenicity , Ulmus/microbiology , Agrobacterium/genetics , Fungal Proteins/genetics , Fungal Proteins/metabolism , Hyphae/genetics , Hyphae/metabolism , Mycotoxins/genetics , Mycotoxins/metabolism , North America , Ophiostoma/physiology , Promoter Regions, Genetic , Spores, Fungal/genetics , Spores, Fungal/metabolism , Transformation, Genetic , Virulence
17.
Indian J Med Res ; 139(6): 940-4, 2014 Jun.
Article in English | MEDLINE | ID: mdl-25109730

ABSTRACT

Hepatitis A virus (HAV) infection, a major cause of childhood hepatitis is transmitted by orofaecal route. Children mostly suffer with subclinical infection but may have serious clinical implications leading to hospitalization and mortality. IgM ELISA and nRT PCR were conducted on the blood samples collected from HAV suspected paediatric cases referred to the viral diagnostic laboratory in the Regional Medical Research Centre for Tribals at Jabalpur, Central India. The nRT PCR products were sequenced and phylogenetic analysis was done. Of the 195 samples tested, 41 (21%) were positive for HAV antibodies, among which 38 (92%) belonged to paediatric age group and 32 per cent of these were hospitalized. nRT PCR and sequencing confirmed the presence of HAV. Phylogenic analysis revealed circulation of genotype III A in central India. Regular serological and molecular monitoring would aid in understanding epidemiology of HAV and plan intervention strategies.


Subject(s)
Antibodies, Viral/blood , Hepatitis A Virus, Human/genetics , Hepatitis A/epidemiology , Phylogeny , Adolescent , Base Sequence , Child , Child, Preschool , Enzyme-Linked Immunosorbent Assay , Female , Genotype , Humans , Immunoglobulin M/immunology , India/epidemiology , Male , Molecular Sequence Data , Reverse Transcriptase Polymerase Chain Reaction , Sequence Analysis, DNA , Species Specificity
18.
Environ Sci Pollut Res Int ; 21(18): 11009-16, 2014 Sep.
Article in English | MEDLINE | ID: mdl-24793071

ABSTRACT

Scientific concern exists about the toxic effect of dichlorodiphenyldichloroethylene (p, p'-DDE) and lindane on male infertility, and the mechanism underlying male reproductive toxicity of this pesticide remains unanswered. We investigated not only the possible association between the chlorinated pesticide levels and semen quality in nonoccupationally exposed men, but also the probable mode of action using mitochondrial membrane potential (MMP), reactive oxygen species (ROS), lipid peroxidation (LPO), and sperm chromatin structure assay (SCSA). A study in 278 men (21-40 years old) who visited Obstetrics and Gynecology Department, KGMU, Lucknow, for semen analysis was conducted. We performed semen analysis according to the WHO guidelines, while p, p'-DDE and lindane analysis was done by the GLC and LPO by the spectrophotometer, and the sperm mitochondrial status, ROS, and SCSA with the flow cytometer. The questionnaire data showed no significant difference in the demographic characteristics between the two groups, i.e., trying to conceive >1 year and proven fertility. However, a significant difference in the concentration of p, p'-DDE and lindane was observed between the groups. When the subjects were divided among four categories by quartile of exposure, the subjects in the highest quartile showed low sperm motility as compared to the subjects in the lowest quartile. Pearson's correlation showed a significant negative correlation between semen p, p'-DDE, lindane level, and sperm quality and positive association with the number of cells with depolarized mitochondria, elevation in ROS production and LPO, and DNA fragmentation index (DFI). The findings are suggestive that these toxicants might cause a decline in semen quality, and these effects might be ROS, LPO, and mitochondrial dysfunction mediated.


Subject(s)
Dichlorodiphenyl Dichloroethylene/toxicity , Environmental Exposure , Environmental Pollutants/toxicity , Hexachlorocyclohexane/toxicity , Infertility, Male/chemically induced , Insecticides/toxicity , Adult , Case-Control Studies , DNA Fragmentation , Female , Flow Cytometry , Humans , Lipid Peroxidation , Male , Membrane Potential, Mitochondrial/drug effects , Pregnancy , Reactive Oxygen Species/metabolism , Reproduction , Semen Analysis , Sperm Motility/drug effects , Spermatozoa/drug effects , Spermatozoa/physiology , Young Adult
19.
Indian J Endocrinol Metab ; 18(1): 89-93, 2014 Jan.
Article in English | MEDLINE | ID: mdl-24701436

ABSTRACT

PURPOSE: The purpose of this study is to investigate the association of the serum 25-hydroxyvitamin D (25-OHD) level with markers of insulin resistance (IR) in postmenopausal Indian women. MATERIALS AND METHODS: This was a cross-sectional study, conducted at a Tertiary Care Hospital in New Delhi, India. Seventy one postmenopausal women (mean age 56.3 ± 7.6 years) were enrolled. Exclusion criteria were known or newly detected diabetics, subjects with chronic renal failure, chronic liver disease or any other chronic inflammatory condition, chronic smokers and chronic alcoholics. Serum calcium (and albumin for calculating corrected calcium), phosphorus, alkaline phosphatase and 25-OHD were measured as parameters of calcium homeostasis. Fasting blood glucose (FBG), systolic and diastolic blood pressures, body mass index (BMI), fasting serum insulin, calculated glucose insulin ratio (GIR), and homeostatic model assessment of insulin resistance (HOMA-IR) were studied as parameters of IR. Data was then analyzed for statistical significance. RESULTS: The mean serum 25-OHD level was 12.73 ± 7.63 ng/ml. The mean BMI was 27.78 ± 5.37 kg/m(2). The mean calculated GIR was 13.14 ± 9.39 and HOMA-IR was 2.31 ± 1.70. Serum 25-OHD was inversely correlated with BMI (correlation coefficient -0.234, P value 0.050) and with HOMA-IR (correlation coefficient -0.237, P value 0.047). However, when 25-OHD was adjusted for BMI the correlation between 25-OHD and HOMA-IR lost its significance. No correlation was found between serum 25-OHD and any other parameters of IR studied. CONCLUSIONS: There is a significant negative linear correlation between 25-OHD and BMI. The significant negative linear correlation between 25-OHD and HOMA-IR was confounded by BMI. There is no correlation between 25-OHD and parameters of IR.

20.
Bioresour Technol ; 148: 535-41, 2013 Nov.
Article in English | MEDLINE | ID: mdl-24080292

ABSTRACT

With aim to develop an efficient and ecofriendly approach for on-site treatment of sewage, a sub-surface flow constructed wetland (CW) has been developed by raising potential aquatic macrophytes; Typha latifolia, Phragmites australis, Colocasia esculenta, Polygonum hydropiper, Alternanthera sessilis and Pistia stratoites in gravel as medium. Sewage treatment potential of CW was evaluated by varying retention time at three different stages of plant growth and stabilization. After 6 months, monitoring of fully established CW indicated reduction of 90%, 65%, 78%, 84%, 76% and 86% of BOD, TSS, TDS, NO3-N, PO4-P and NH4-N, respectively in comparison to inlet after 36 h of retention time. Sewage treatment through CW also resulted in reduction of heavy metal contents. Thus, CW proved an effective method for treatment of wastewater and may be developed along river Ganga stretch as an alternative technology. Treated water may be drained into river to check further deterioration of Ganga water quality.


Subject(s)
Biotechnology/methods , Conservation of Natural Resources , Rivers/chemistry , Water Pollution/analysis , Water Purification/methods , Wetlands , Biodegradation, Environmental , Chemical Phenomena , Plants/metabolism , Sewage , Water Quality
SELECTION OF CITATIONS
SEARCH DETAIL
...