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1.
Sci Rep ; 14(1): 16413, 2024 Jul 16.
Article in English | MEDLINE | ID: mdl-39013943

ABSTRACT

Understanding the prevalence of abnormal lung function and its associated factors among patients recovering from COVID-19 is crucial for enhancing post-COVID care strategies. This study primarily aimed to determine the prevalence and types of spirometry abnormalities among post-COVID-19 patients in Malaysia, with a secondary objective of identifying its associated factors. Conducted at the COVID-19 Research Clinic, Faculty of Medicine, University Technology MARA, from March 2021 to December 2022, this study included patients at least three months post-discharge from hospitals following moderate-to-critical COVID-19. Of 408 patients studied, abnormal spirometry was found in 46.8%, with 28.4% exhibiting a restrictive pattern, 17.4% showing preserved ratio impaired spirometry (PRISm), and 1.0% displaying an obstructive pattern. Factors independently associated with abnormal spirometry included consolidation on chest X-ray (OR 8.1, 95% CI 1.75-37.42, p = 0.008), underlying cardiovascular disease (OR 3.5, 95% CI 1.19-10.47, p = 0.023), ground-glass opacity on chest X-ray (OR 2.6, 95% CI 1.52-4.30, p < 0.001), and oxygen desaturation during the 6-min walk test (OR 1.9, 95% CI 1.20-3.06, p = 0.007). This study highlights that patients recovering from moderate-to-critical COVID-19 often exhibit abnormal spirometry, notably a restrictive pattern and PRISm. Routine spirometry screening for high-risk patients is recommended.


Subject(s)
COVID-19 , Patient Discharge , Spirometry , Humans , COVID-19/epidemiology , COVID-19/diagnosis , COVID-19/physiopathology , Spirometry/methods , Male , Female , Cross-Sectional Studies , Middle Aged , Malaysia/epidemiology , Adult , SARS-CoV-2/isolation & purification , Aged , Lung/physiopathology , Lung/diagnostic imaging , Prevalence
2.
Indian J Otolaryngol Head Neck Surg ; 75(Suppl 1): 584-587, 2023 Apr.
Article in English | MEDLINE | ID: mdl-37206752

ABSTRACT

This is a case of a patient with history of ear surgery who visited ENT outdoor, for continuous vertigo which used to get aggravated with loud noise, associated with hearing loss, persistent sensations of right-sided aural fullness/pressure and otalgia for last 2 years. He had history of tympanoplasty with ossiculoplasty using a TORP. On exploration under local anesthesia there was a displaced prosthesis into inner ear, upon removal of which symptoms and severity subsided exponentially.

3.
Indian J Cancer ; 59(3): 387-393, 2022.
Article in English | MEDLINE | ID: mdl-33753616

ABSTRACT

Background: There is limited access to 1 year of adjuvant trastuzumab in resource-constrained settings. Most randomized studies have failed to prove non-inferiority of shorter durations of adjuvant trastuzumab compared to 1 year However, shorter durations are often used when 1 year is not financially viable. We report the outcomes with 12 weeks of trastuzumab administered as part of curative-intent treatment. Methods: This is a retrospective analysis of patients treated at Tata Memorial Centre, Mumbai, a tertiary care cancer center in India. Patients with human epidermal growth factor receptor (HER2)-positive early or locally advanced breast cancer who received 12 weeks of adjuvant or neoadjuvant trastuzumab with paclitaxel and four cycles of an anthracycline-based regimen in either sequence, through a patient assistance program between January 2011 and December 2012, were analyzed for disease-free survival (DFS), overall survival (OS), and toxicity. Results: A total of 102 patients were analyzed with a data cutoff in September 2019. The median follow-up was 72 months (range 6-90 months), the median age was 46 (24-65) years, 51 (50%) were postmenopausal, 37 (36%) were hormone receptor-positive, and 61 (60%) had stage-III disease. There were 37 DFS events and 26 had OS events. The 5-year DFS was 66% (95% Confidence Interval [CI] 56-75%) and the OS was 76% (95% CI 67-85%), respectively. Cardiac dysfunction developed in 11 (10.7%) patients. Conclusion: The use of neoadjuvant or adjuvant 12-week trastuzumab-paclitaxel in sequence with four anthracycline-based regimens resulted in acceptable long-term outcomes in a group of patients, most of whom had advanced-stage nonmetastatic breast cancer.


Subject(s)
Breast Neoplasms , Neoadjuvant Therapy , Female , Humans , Middle Aged , Anthracyclines/therapeutic use , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Breast Neoplasms/pathology , Chemotherapy, Adjuvant , Disease-Free Survival , Neoadjuvant Therapy/adverse effects , Paclitaxel/therapeutic use , Receptor, ErbB-2/metabolism , Retrospective Studies , Trastuzumab/therapeutic use
4.
J Proteomics ; 240: 104185, 2021 05 30.
Article in English | MEDLINE | ID: mdl-33737237

ABSTRACT

Noise Induced Hearing Loss (NIHL) is caused by excessive noise exposure due to occupational activities thus affects communication and quality of life. Prolonged occupational and environmental exposure to loud noise damages key molecules present in the micro-machinery of the ear which are required for the mechano-electrical transduction of sound waves in cochlea. Specific proteins are known to be associated with hearing loss and related structural and functional disabilities in the human inner, outer hair cells and cochlea. Rationale of this study was to identify the cochlear proteins associated with the pathophysiology of NIHL using proteomic approaches in mining based industrial workers. Total (n = 210) samples were collected from mining based industrial workers of central India. Subjects were categorized based on audiometric analysis. Proteome changes of the host serum were investigated using one and two-dimensional electrophoresis in combination with LC-MS/MS and MALDI-TOF-MS. Up-regulated 46 cochlear proteins among confirmed NIHL cases were identified by MASCOT. Shrinkage discriminant analysis provided top 25 discriminating feature proteins namely myosin, transthyretin, SERPIN, CCDC50, enkurin, transferin etc. The identified potential proteins may be used as biomarkers for early detection and to understand the pathogenic mechanism of NIHL. Evaluation of these biomarkers in follow-up cases may further aid in improving NIHL diagnosis. SIGNIFICANCE: Human proteome study in Noise Induced Hearing Loss (NIHL) cases has not been published till date. This study represents most comprehensive proteomic analysis in NIHL cases taken from Indian mine workers. The identified key twenty-five discriminating feature proteins which are upregulated when an individual develops (or is in stage of development of) NIHL, provides insights into the potential roles of these varied proteins in disease progression. The proteins thus identified by proteomic approach may be used as early diagnostic biomarker to predict the occurrence of disease at very early stage.


Subject(s)
Hearing Loss, Noise-Induced , Noise, Occupational , Occupational Diseases , Occupational Exposure , Blood Proteins , Chromatography, Liquid , Hearing Loss, Noise-Induced/diagnosis , Hearing Loss, Noise-Induced/etiology , Humans , India , Noise, Occupational/adverse effects , Occupational Diseases/diagnosis , Occupational Diseases/etiology , Occupational Exposure/adverse effects , Proteomics , Quality of Life , Tandem Mass Spectrometry
5.
Sahel medical journal (Print) ; 22(1): 28-32, 2019. tab
Article in English | AIM (Africa) | ID: biblio-1271701

ABSTRACT

Background: Diabetic foot infection (DFI) is a dreaded complication of diabetes mellitus, which usually occurs following foot ulceration. It may starts as a monomicrobial infection and end up as a polymicrobial infection. Antimicrobial regimens are usually selected empirically initially, based on local epidemiological and antimicrobial susceptibility pattern. Objective: The aim is to investigate the microbiological profile of patients admitted with DFIs in our institution and determine the antimicrobial susceptibility pattern of the isolates. Materials and Methods: A 2­year retrospective observational study of patients admitted with DFI into our institution. The microbiological culture and antimicrobial susceptibility results of swab specimens from the patients were retrieved and reviewed. These were correlated with the clinical stage of the disease. Results: Fifty­six patients' medical records were reviewed. There were 35 males and 21 females. The mean age of the patients was 56.2 years (range 48­75 years). Three patients had bilateral lesions. The Wagner grades of the lesions were Grades II­V, with Grade IV being predominant. Eight bacteria species and a fungus were isolated from the 59 swab specimens studied. Four specimens yielded no growth, whereas 7 specimens yielded contaminants. Monomicrobial cultures were predominant, with Gram­negative bacteria being preponderant.Staphylococcus aureus was the most common isolate, followed by Proteus species. The isolates showed greater susceptibility to levofloxacin and ciprofloxacin. Conclusion: The findings suggest that either levofloxacin or ciprofloxacin should be the anchor antimicrobial agent in empirical treatment of DFI in our locality


Subject(s)
Diabetic Foot , Disease Susceptibility
6.
Indian J Occup Environ Med ; 22(2): 60-73, 2018.
Article in English | MEDLINE | ID: mdl-30319226

ABSTRACT

Noise-induced hearing loss (NIHL) is one of the major occupational disease that has influence on the quality of life of mining workers. Several reports suggest NIHL is attributed to noise exposure at workplace and approximately 16% of hearing loss is due to it. NIHL occurs as a result of exposure to high-level noise (>85 dB) in the workplace. Noise disrupts proteins present in the micromachinery of the ear that is required for mechano-electric transduction of sound waves. High-level noise exposure can lead to hearing impairment owing to mechanical and metabolic exhaustion in cochlea, the major organ responsible for resilience of sound. Several key proteins of cochlea include tectorial membrane, inner hair cells, outer hair cells, and stereocilia are damaged due to high-level noise exposure. Numerous studies conducted in animals have shown cochlear proteins involvement in NIHL, but the pertinent literature remains limited in humans. Detection of proteins and pathways perturbed within the micromachinery of the ear after excessive sound induction leads toward the early identification of hearing loss. The situation insisted to present this review as an update on cochlear proteins associated with NIHL after an extensive literature search using several electronic databases which help to understand the pathophysiology of NIHL.

7.
Indian J Occup Environ Med ; 19(2): 102-9, 2015.
Article in English | MEDLINE | ID: mdl-26500413

ABSTRACT

INTRODUCTION: Bauxite ore is a major source of aluminum (Al) which contains approximately 35-60% Al by weight. Occupational and environmental bauxite dust exposure may cause toxicity by interaction with human biological systems resulting in oxidative stress (OS) and cell death. A neopterin derivative as an antioxidant is able to modulate cytotoxicity by the induction of OS. MATERIALS AND METHODS: A total of 273 subjects were selected for blood collection from three different major Al producing bauxite mines and were categorized into three groups as experimental (Exp) (n = 150), experimental controls (ExC) (n = 73) and control (Con) (n = 50). Whole blood and serum samples were used for measurement of Al, neopterin, urea and creatinine values. Statistical analysis was performed using R-2.15.1 programming language. RESULTS AND DISCUSSION: The result showed that age, body mass index and the behavioral habits, that is, smoking, tobacco and alcohol consumption have possible effects on neopterin level. Serum neopterin levels were found to be significantly higher (P <0.0001) in the experimental group as compared to other groups. Significantly positive correlation (P < 0.0001) was observed between neopterin and creatinine. It was also observed that neopterin level increases as the duration of exposure increases. CONCLUSION: On the basis of findings it was concluded that exposure to bauxite dust (even at low levels of Al) changes biochemical profile leading to high levels of serum neopterin. Levels of serum neopterin in workers exposed to bauxite dust were probably examined for the 1(st) time in India. The outcome of this study suggested that serum neopterin may be used as potential biomarker for early detection of health risks associated with bauxite dust exposed population.

8.
J Neuroendocrinol ; 27(9): 718-36, 2015 Sep.
Article in English | MEDLINE | ID: mdl-26147314

ABSTRACT

The neuropeptide arginine vasotocin (AVT) has versatile physiological functions in non-mammalian vertebrates. However, the functional association between AVT and neurosteroidogenesis in the early brain of teleosts remains elusive. We thus studied the developmental expression patterns of the avt gene and their V1 type receptor (avt-rv1 ) at various stages of development [90-150 days after hatching (dah)] in relation to neurosteroidogenesis and oestrogen signalling in the early brain of the orange-spotted grouper (Epinephelus coioides). avt and avt-rv1 mRNAs displayed a significantly increase in expression at 110 dah in the telencephalon and diencephalon. Further, avt mRNAs were localised in three magnocellular neuronal populations of the preoptic area, such as parvocellular, magnocellular and gigantocellular preoptic neurones. Intriguingly, the avt transcripts in those neurones were more abundant in 110 dah compared to other ages. Subsequently, dual fluorescence in situ hybridisation analysis showed that the avt and avt-rv1 genes were highly coexpressed with cyp11a1, hsd3b1, cyp17a1, erα, erß and gpr30, which indicates their potential for functional association. Cyp19a1b-immunoreactive positive fibres were found in close proximity to avt-expressing neurones. Moreover, our results showed that exogenous Avt caused a significant increase in the cellular and gene levels of steroidogenic enzymes and oestrogen receptors (ers), whereas the administration of an Avt-rv1 antagonist caused a decrease in the expression of both steroidogenic enzymes and ers genes in the brain. Furthermore, exogenous oestradiol (E2 ) strongly up-regulated avt mRNAs in the grouper brain. Taken together, the present studies suggest that avt and steroidogenesis may positively work together to increase both E2 biosynthesis and early brain development.


Subject(s)
Brain/metabolism , Estradiol/metabolism , Fish Proteins , Gonads/metabolism , Perciformes/metabolism , Receptors, Estrogen/metabolism , Receptors, Vasopressin/metabolism , Vasotocin/metabolism , Animals , Brain/enzymology , Brain/growth & development , Gene Expression , Gene Expression Regulation, Developmental , Molecular Sequence Data , Perciformes/genetics , Perciformes/growth & development , RNA, Messenger , Receptors, Vasopressin/genetics , Sex Differentiation , Vasotocin/genetics
9.
Lett Appl Microbiol ; 60(3): 229-36, 2015 Mar.
Article in English | MEDLINE | ID: mdl-25348627

ABSTRACT

UNLABELLED: An attempt was made to produce bioethanol using optimized fermentation parameters and mutationally improved strain of Candida albicans. The mutant strain OMC3E6 obtained by UV irradiation followed by ethidium bromide successive mutations showed 2.6 times more glucoamylase secretion and 1.5 times more bioethanol production via direct conversion of starch. Enhanced hydrolysis of insoluble starch (72%) and potato starch (70%) was achieved with glucoamylase enzyme preparation from mutant C. albicans. In fermentation medium, the use of maltose, corn steep liquor, NaH2 PO4 , NaCl + MgSO4 and Triton X-100 has increased the glucoamylase production by the microbe. Under optimized conditions, C. albicans eventually produced 437 g ethanol kg(-1) potatoes. Earlier reports mentioned the use of thrice the quantity of starch as reported by us followed by more fermentation period (3-4 days) and demanded pretreatment of starch sources with alpha-amylase as well. Here, we simplified these three steps and obtained 73% conversion of insoluble starch into ethanol via direct conversion method in a period of 2 days without the involvement of cell immobilizations or enzyme pretreatment steps. SIGNIFICANCE AND IMPACT OF THE STUDY: Due to fast depletion of fossil fuels in the modern world, bioethanol usage as an alternate energy source is the need of the hour. For the first time, we report bioethanol production by Candida albicans via direct conversion of starchy biomass into ethanol along with enhanced starch-hydrolysing capacity and ethanol conversion ratio. So far, C. albicans was dealt in the field of clinical pathology, but here we successfully employed this organism to produce bioethanol from starchy agri-substrates. Optimizing fermentation parameters and improving the microbial strains through successive mutagenesis can improve the end product yield.


Subject(s)
Biofuels , Candida albicans/enzymology , Starch/metabolism , alpha-Amylases/genetics , Candida albicans/genetics , Cells, Immobilized , Ethanol/metabolism , Fermentation/physiology , Hydrolysis , Maltose/metabolism , Mutation , Solanum tuberosum/metabolism , Zea mays/metabolism , alpha-Amylases/metabolism
10.
J Clin Microbiol ; 51(7): 2391-5, 2013 Jul.
Article in English | MEDLINE | ID: mdl-23616452

ABSTRACT

Human and bovine norovirus virus-like particles were used to evaluate antibodies in Indian children at ages 6 and 36 months and their mothers. Antibodies to genogroup II viruses were acquired early and were more prevalent than antibodies to genogroup I. Low levels of IgG antibodies against bovine noroviruses indicate possible zoonotic transmission.


Subject(s)
Antibodies, Viral/blood , Caliciviridae Infections/epidemiology , Caliciviridae Infections/immunology , Norovirus/immunology , Animals , Caliciviridae Infections/transmission , Child, Preschool , Cohort Studies , Female , Humans , Immunoglobulin G/blood , India/epidemiology , Infant , Male , Mothers , Norovirus/genetics , Prevalence , Zoonoses/epidemiology , Zoonoses/immunology
11.
J Neuroendocrinol ; 24(5): 818-30, 2012 May.
Article in English | MEDLINE | ID: mdl-22250893

ABSTRACT

The mRNA expression of genes for corticotrophin-releasing hormone (CRH) and the hormone receptors CRH-receptor/CRH-R, glucocorticoid receptor 1/2 (GR1/2) and mineralocorticoid receptor (MR) was studied in the brain, pituitary and gill of tilapia (Oreochromis mossambibus) during salinity and handling stress by real-time quantitative-polymerase chain reaction analysis. The results indicated that the transcripts of CRH and CRH-R were increased in the forebrain, midbrain and gill, whereas elevated hypothalamic CRH mRNA suppressed the CRH-R mRNA in the pituitary in seawater (SW) fish. The levels of plasma osmolality and cortisol were significantly increased in SW compared to freshwater fish. The up-regulation of GR1, GR2, MR and α-NKA (Na(+) /K(+) -ATPase) transcripts in SW fish provided evidence that cortisol responds to stress and involves ion-base regulation via the GR1, GR2 and MR receptors in the gill. These data suggest that GR1, GR2 and MR have a pivotal role in the brain and gill. GR1, GR2 and MR expression may be dependent on CRH and cortisol expression in the brain and gill. In addition, we performed in situ hybridisation analysis to localise and differentiate the CRH, CRH-R, GR1, GR2 and MR transcripts in the brain of FW- and SW-acute acclimated tilapia during salinity stress. In almost all transcripts, the hybridisation signal was significantly abundant in the SW-acute acclimated tilapia brain, especially in the dorsal ventral cephalon, dorsal nucleus preopticus pars magnocellularis and dorsal nucleus preopticus pars parvocellularis. Salinity stress induced differential and specific responses in the gill and brain compared to handling stress.


Subject(s)
Acclimatization/genetics , Brain/metabolism , Corticotropin-Releasing Hormone/physiology , Gills/metabolism , Pituitary Gland/metabolism , Receptors, Steroid/physiology , Tilapia , Acclimatization/physiology , Animals , Corticotropin-Releasing Hormone/genetics , Corticotropin-Releasing Hormone/metabolism , Handling, Psychological , Hydrocortisone/blood , Hydrocortisone/metabolism , Random Allocation , Receptors, Steroid/genetics , Receptors, Steroid/metabolism , Salinity , Seawater , Stress, Physiological/physiology , Stress, Psychological/genetics , Stress, Psychological/metabolism , Tilapia/genetics , Tilapia/metabolism , Tilapia/physiology , Water-Electrolyte Balance/genetics
12.
Indian J Occup Environ Med ; 14(2): 31-8, 2010 Aug.
Article in English | MEDLINE | ID: mdl-21120077

ABSTRACT

Silicosis is a chronic lung disease characterized by granulomatous and fibrotic lesions, which occurs due to accumulation of respirable silica mineral particles. Apoptosis is an important phenomenon of cell death in silicosis. The relationship between silica dust and its exposure is well established. But, the complex chain of cellular responses, which leads to caspase activation in silicosis, has not been fully discovered. Caspase activation plays a central role in the execution of apoptosis. Silica-induced apoptosis of the alveolar macrophages could potentially favor a proinflammatory state, occurring in the lungs of silicotic patients, resulting in the activation of caspase prior to induction of the intrinsic and extrinsic apoptosis pathways. Recent studies indicated that apoptosis may involve in pulmonary disorders. This review summarizes the current knowledge about the underling mechanism of biochemical pathways in caspase activation that have been ignored so far in silicosis. In addition, caspase could be a key apoptotic protein that can be used as an effective biomarker for the study of occupational diseases. It may provide an important link in understanding the molecular mechanisms of silica-induced lung pathogenesis.

13.
J Clin Oncol ; 28(14): 2356-64, 2010 May 10.
Article in English | MEDLINE | ID: mdl-20368538

ABSTRACT

PURPOSE: We assessed the prognostic impact of IDH1 R132 mutations and a known single nucleotide polymorphism (SNP) located in the same exon of the IDH1 gene in patients with cytogenetically normal acute myeloid leukemia (CN-AML) in the context of other prognostic markers. PATIENTS AND METHODS: IDH1 exon four was directly sequenced in 275 CN-AML patients from two subsequent AML multicenter treatment trials and 120 healthy volunteers. Moreover, mutations in NPM1, FLT3, CEBPA, and WT1 were analyzed, and mRNA expression of IDH1 was quantified. RESULTS: IDH1 R132 mutations were found in 10.9% of CN-AML patients. IDH1 SNP rs11554137 was found in 12% of CN-AML patients and 11.7% of healthy volunteers. IDH1 R132 mutations had no impact on prognosis. In contrast, IDH1 SNP rs11554137 was an adverse prognostic factor for overall survival in univariate and multivariate analysis. Other significant factors were age, NPM1/FLT3 mutational status, WT1 SNP rs16754, and platelet count. The impact of IDH1 SNP rs11554137 was most pronounced in the NPM1/FLT3 high-risk patients (either NPM1 wild-type or FLT3-internal tandem duplication positive). Patients with IDH1 SNP rs11554137 had a higher expression of IDH1 mRNA than patients with two wild-type alleles. CONCLUSION: IDH1 SNP rs11554137 but not IDH1 R132 mutations are associated with an inferior outcome in CN-AML.


Subject(s)
Isocitrate Dehydrogenase/genetics , Leukemia, Myeloid, Acute/genetics , Mutation , Polymorphism, Single Nucleotide , Adolescent , Adult , Chi-Square Distribution , DNA Mutational Analysis , Disease-Free Survival , Exons , Female , Gene Expression Regulation, Enzymologic , Gene Expression Regulation, Leukemic , Genotype , Germany , Humans , Kaplan-Meier Estimate , Karyotyping , Leukemia, Myeloid, Acute/mortality , Leukemia, Myeloid, Acute/therapy , Male , Middle Aged , Nucleophosmin , Odds Ratio , Phenotype , Proportional Hazards Models , RNA, Messenger/analysis , Recurrence , Risk Assessment , Risk Factors , Time Factors , Treatment Outcome , Young Adult
14.
Arch Intern Med ; 170(2): 203-7, 2010 Jan 25.
Article in English | MEDLINE | ID: mdl-20101017

ABSTRACT

BACKGROUND: As human immunodeficiency virus (HIV)-infected individuals are living longer, non-AIDS-defining cancers are becoming increasingly recognized. Primary esophageal tumors in people living with HIV have seldom been reported. We sought to document patient, virologic, and tumor characteristics and clinical outcomes in this patient group. METHODS: International physicians involved in the care of AIDS-defining and non-AIDS-defining cancers accrued cases of primary esophageal malignant neoplasms in HIV-infected individuals. Patient demographics, HIV status, cancer risk factors, esophageal tumor characteristics, treatment, and outcomes were analyzed. RESULTS: A total of 19 patients with primary adenocarcinoma and/or squamous cell carcinoma of the esophagus were identified. The median age was 48 years (range, 35-69 years) and the median CD4 lymphocyte count measured 376 cells/microL (range, 42 to >1000 cells/microL) (to convert to x10(9)/L, multiply by 0.001). The majority of patients were men with a history of smoking or considerable alcohol consumption. Prior esophageal disease (reflux, peptic ulcers, and achalasia) was reported in almost half of all patients. Seven patients (37%) underwent surgical resection, 11 (58%) received fluorouracil-based chemotherapy, and 7 (37%) underwent radiotherapy; survival correlated with stage at cancer presentation. While the majority of patients died, only 5 deaths (26%) were attributed to progression of esophageal carcinoma. CONCLUSIONS: Primary esophageal carcinoma is another non-AIDS-defining cancer associated with moderate immunosuppression and lifestyle habits including tobacco and alcohol use. The biological behavior, treatment, and outcome of HIV-related esophageal cancer appear similar to the general population with this disease; the same screening and risk moderation strategies are likely to apply.


Subject(s)
Adenocarcinoma/complications , Antiretroviral Therapy, Highly Active , Carcinoma, Squamous Cell/complications , Esophageal Neoplasms/complications , HIV Infections/complications , Adenocarcinoma/diagnosis , Adenocarcinoma/pathology , Adult , Aged , CD4 Lymphocyte Count , Carcinoma, Squamous Cell/diagnosis , Carcinoma, Squamous Cell/pathology , Esophageal Neoplasms/diagnosis , Esophageal Neoplasms/pathology , Female , HIV Infections/diagnosis , HIV Infections/drug therapy , HIV Infections/immunology , Humans , Male , Middle Aged
15.
Indian J Occup Environ Med ; 12(3): 107-11, 2008 Dec.
Article in English | MEDLINE | ID: mdl-20040967

ABSTRACT

Neopterin is regarded as an early biomarker of the cellular immune response. This low molecular mass compound belongs to the class of pteridine and is a metabolite of guanosine triphosphate, which is produced by the activated macrophages and dendritic cells after stimulation with gamma-interferon. An international group acknowledges the fact that the levels of serum neopterin can be used as a marker of the effect of exposure to silica and other occupational diseases. The determination of neopterin is an innovative tool for monitoring diseases associated with the activation of cell-mediated immunity.

16.
Med Phys ; 33(4): 1041-52, 2006 Apr.
Article in English | MEDLINE | ID: mdl-16696481

ABSTRACT

Although conventional mammography is currently the best modality to detect early breast cancer, it is limited in that the recorded image represents the superposition of a three-dimensional (3D) object onto a 2D plane. Recently, two promising approaches for 3D volumetric breast imaging have been proposed, breast tomosynthesis (BT) and CT breast imaging (CTBI). To investigate possible improvements in lesion detection accuracy with either breast tomosynthesis or CT breast imaging as compared to digital mammography (DM), a computer simulation study was conducted using simulated lesions embedded into a structured 3D breast model. The computer simulation realistically modeled x-ray transport through a breast model, as well as the signal and noise propagation through a CsI based flat-panel imager. Polyenergetic x-ray spectra of Mo/Mo 28 kVp for digital mammography, Mo/Rh 28 kVp for BT, and W/Ce 50 kVp for CTBI were modeled. For the CTBI simulation, the intensity of the x-ray spectra for each projection view was determined so as to provide a total average glandular dose of 4 mGy, which is approximately equivalent to that given in conventional two-view screening mammography. The same total dose was modeled for both the DM and BT simulations. Irregular lesions were simulated by using a stochastic growth algorithm providing lesions with an effective diameter of 5 mm. Breast tissue was simulated by generating an ensemble of backgrounds with a power law spectrum, with the composition of 50% fibroglandular and 50% adipose tissue. To evaluate lesion detection accuracy, a receiver operating characteristic (ROC) study was performed with five observers reading an ensemble of images for each case. The average area under the ROC curves (Az) was 0.76 for DM, 0.93 for BT, and 0.94 for CTBI. Results indicated that for the same dose, a 5 mm lesion embedded in a structured breast phantom was detected by the two volumetric breast imaging systems, BT and CTBI, with statistically significant higher confidence than with planar digital mammography, while the difference in lesion detection between BT and CTBI was not statistically significant.


Subject(s)
Breast Neoplasms/diagnostic imaging , Imaging, Three-Dimensional/methods , Mammography/methods , Models, Biological , Radiographic Image Enhancement/methods , Radiographic Image Interpretation, Computer-Assisted/methods , Tomography, Spiral Computed/methods , Algorithms , Computer Simulation , Humans , Information Storage and Retrieval/methods , Observer Variation , Reproducibility of Results , Sensitivity and Specificity , Tomography/methods
17.
J Appl Microbiol ; 98(2): 318-23, 2005.
Article in English | MEDLINE | ID: mdl-15659186

ABSTRACT

AIM: Isolation of cellulase producing fungi and increasing cellulase production using novel mutations. METHODS AND RESULTS: Cellulase-producing fungi were isolated from different soil samples using enriched Mandels cellulose agar, which is a selective media and seven different fungi were selected in the screening programme. These organisms were tested for cellulase production and two potent strains were identified. Two methods of mutations for strain improvement were employed to these strains. (1) Germinating fungal spore suspension was treated with 0.1 and 0.2 mg ml(-1) of 1-methyl-3-nitro-1-nitrosoguanidine (MNNG), ethidium bromide (EtBr) and u.v. for 30 min and 1 h duration and plated on selective media with and with out amphotericin B. (2) Mutagens (EtBr and MNNG) were incorporated in the selective media in sublethal concentration (5 microg ml(-1)) along with antifungal antibiotic (amphotericin B 2 microg ml(-1)). Second method yielded maximum cellulase-producing mutants, which are also stable for cellulase production and are more potent than the mutants obtained by the first method. CONCLUSIONS: Mutations using sublethal concentrations of mutagen for a prolonged period of growth has yielded mutants, which can produce more cellulase. SIGNIFICANCE AND IMPACT OF THE STUDY: This new method could be applied to obtain potent fungal mutants for more enzymes production.


Subject(s)
Cellulase/metabolism , Fungi/metabolism , Soil Microbiology , Amphotericin B/pharmacology , Antifungal Agents/pharmacology , Biodegradation, Environmental , Ethidium/pharmacology , Fungi/genetics , Methylnitronitrosoguanidine/pharmacology , Microbiological Techniques , Mutagenesis , Mutagens/pharmacology , Spores , Ultraviolet Rays
18.
Phys Med Biol ; 49(11): 2183-95, 2004 Jun 07.
Article in English | MEDLINE | ID: mdl-15248571

ABSTRACT

The purpose of this study was to investigate microcalcification detectability using CT mammography with a flat-panel imager. To achieve this, a computer simulation was developed to model an amorphous-silicon, CsI based flat-panel imager system using a linear cascaded model. The breast was modelled as a hemi-ellipsoid shape with composition of 50% adipose and 50% glandular tissue. Microcalcifications were modelled as small spheres having a composition of calcium carbonate. The results show that with a mean glandular dose equivalent to that typically used in two-view screening mammography, CT mammography with a flat-panel detector is capable of providing images where most microcalcifications are detectable. A receiver operating characteristic (ROC) study was conducted by five physicist observers viewing simulated CT mammography reconstructions. The results suggest that the microcalcification with its diameter equal to or greater than 0.175 mm can be detected with an average area under the ROC curve (AUC) greater than 0.95 using 0.1 or 0.2 mm pixelized detectors. The results also indicate that the optimal pixel size of the detector is around 0.2 mm for microcalcification detection, based on the trade-off between detectability of microcalcifications and the time required for data acquisition and reconstruction.


Subject(s)
Algorithms , Breast Diseases/diagnostic imaging , Calcinosis/diagnostic imaging , Imaging, Three-Dimensional/methods , Mammography/methods , Radiographic Image Enhancement/methods , Radiographic Image Interpretation, Computer-Assisted/methods , Computer Simulation , Equipment Failure Analysis/methods , Image Enhancement/methods , Imaging, Three-Dimensional/instrumentation , Mammography/instrumentation , Models, Biological , Pattern Recognition, Automated/methods , Radiographic Image Enhancement/instrumentation , Reproducibility of Results , Sensitivity and Specificity , Signal Processing, Computer-Assisted , Tomography, X-Ray Computed/instrumentation , Tomography, X-Ray Computed/methods
19.
Ann Pharmacother ; 35(9): 1037-41, 2001 Sep.
Article in English | MEDLINE | ID: mdl-11573852

ABSTRACT

OBJECTIVE: To report a case of multiple episodes of seizure activity in an AIDS patent following amphotericin B infusion. CASE SUMMARY: A 46-year-old African-American man experienced recurrent grand mal seizures during intravenous infusion of amphotericin B, then petit mal seizures as the infusion was stopped and the drug concentrations decreased with time. The patients concurrent medications included didanosine, hydroxyzine, promethazine, hydrocortisone, and prochlorperazine. Despite administration of phenytoin and lorazepam, the seizures persisted and occurred only during amphotercin B administration. DISCUSSION: AIDS and cryptococcal meningitis, both of which the patient had, can potentially cause seizures. The patient had a history of alcohol abuse; alcohol intake as well as withdrawal can also cause seizures. Didanosine also has a potential for inducing seizures. However, these other potential causes of seizure were ruled out. The time course of events suggested that amphotericin B was the cause of the seizures in this AIDS patient. CONCLUSIONS: Amphotericin B seems to be the probable cause of the seizures. To date, only three cases of seizures associated with amphotericin B have been reported in the literature, but healthcare providers should be aware of the potential for this rare adverse effect.


Subject(s)
AIDS-Related Opportunistic Infections/drug therapy , Amphotericin B/adverse effects , Antifungal Agents/adverse effects , Meningitis, Cryptococcal/drug therapy , Seizures/chemically induced , Humans , Infusions, Intravenous , Male , Middle Aged
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