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101.
Mosayeb Rostamian Roya Chegene Lorestani Somayeh Jafari Rezvan Mansouri Shahab Rezaeian Keyghobad Ghadiri Alisha Akya 《Indian journal of medical microbiology》2022,40(3):323-329
BackgroundNeisseria meningitidis is one of the most important causes of meningitis and pathogens-associated deaths in developing and developed countries. Effective anti-microbial agents are pivotal to treat and control N. meningitidis infections. The aim of the present study was to systematically review published studies on the antibiotic resistance of N. meningitidis in the last 20 years (2000–2020) in the world.MethodsPublished researches were identified through a literature search using reputable databases including PubMed, Scopus, and Web of Science. Finally, 24 studies were included for a random-effects model meta-analysis.ResultsThe overall resistance to most commonly used antibiotics such as ceftriaxone, cefotaxime, ciprofloxacin and rifampin was low, ranging from 1 to 3.4%. However, non-sensitivity to penicillin, as the first-line antibiotic against N. meningitidis, was higher (27.2%). Altogether, the resistance to the first-line antibiotics (except penicillin) is still low indicating these drugs are effective against meningococcal meningitis. We also found a significant gap between MIC and disk diffusion for evaluating resistance to antibiotics in which disk diffusion overestimate the resistance rate.ConclusionsTo properly management and prevent the spread of N. miningitidis isolates resistant antibiotics, it is necessary to monitor the pattern of antibiotic susceptibility regionally and globally using the MIC methods. 相似文献
102.
A Mansouri 《The American journal of the medical sciences》1985,289(5):200-209
Oxygen transport, the major function of hemoglobin, is dependent upon reduced heme iron. In the red cell, the heme iron is maintained in the reduced form by the methemoglobin reduction system. When the balance between oxidation and reduction of heme iron is perturbed due to the presence of excessive oxidants, decreased reducing capacity or the presence of abnormal hemoglobin, methemoglobinemia ensues. In most cases methemoglobinemia is transitory and of no major clinical consequence. Occasionally, however, it can be life threatening and must be rapidly diagnosed and treated. When methemoglobinemia is of hereditary nature, either due to deficiency of red cell NADH-methemoglobin reductase or due to the presence of M hemoglobin, it is a lifelong problem. Since most of these patients do not have major disabling symptoms, the treatment is aimed at correction of cyanosis. 相似文献
103.
104.
Mansouri A Tarhuni A Larosche I Reyl-Desmars F Demeilliers C Degoul F Nahon P Sutton A Moreau R Fromenty B Pessayre D 《Digestive diseases (Basel, Switzerland)》2010,28(6):756-775
Both acute and chronic alcohol consumption increase reactive oxygen species (ROS) formation and lipid peroxidation, whose products damage hepatic mitochondrial DNA (mtDNA). To test whether manganese superoxide dismutase (MnSOD) overexpression modulates acute and chronic alcohol-induced mtDNA lesions, transgenic MnSOD-overexpressing (TgMnSOD(+++)) mice and wild-type (WT) mice were treated by alcohol, either chronically (7 weeks in drinking water) or acutely (single intragastric dose of 5 g/kg). Acute alcohol administration increased mitochondrial ROS formation, decreased mitochondrial glutathione, depleted and damaged mtDNA, durably increased inducible nitric oxide synthase (NOS) expression, plasma nitrites/nitrates and the nitration of tyrosine residues in complex V proteins and decreased complex V activity in WT mice. These effects were prevented in TgMnSOD(+++) mice. In acutely alcoholized WT mice, mtDNA depletion was prevented by tempol, a superoxide scavenger, L-NAME and 1400W, two NOS inhibitors, or uric acid, a peroxynitrite scavenger. In contrast, chronic alcohol consumption decreased cytosolic glutathione and increased hepatic iron, lipid peroxidation products and respiratory complex I protein carbonyls only in ethanol-treated TgMnSOD(+++) mice but not in WT mice. In chronic ethanol-fed TgMnSOD(+++) mice, but not WT mice, mtDNA was damaged and depleted, and the iron chelator, deferoxamine (DFO), prevented this effect. In conclusion, MnSOD overexpression prevents mtDNA depletion after an acute alcohol binge but aggravates this effect after prolonged alcohol consumption, which selectively triggers iron accumulation in TgMnSOD(+++) mice but not in WT mice. In the model of acute alcohol binge, the protective effects of MnSOD, tempol, NOS inhibitors and uric acid suggested a role of the superoxide anion reacting with NO to form mtDNA-damaging peroxynitrite. In the model of prolonged ethanol consumption, the protective effects of DFO suggested the role of iron reacting with hydrogen peroxide to form mtDNA-damaging hydroxyl radical. 相似文献
105.
Millaray Marincevic Mahmoud Mansouri Meena Kanduri Anders Isaksson Hanna G?ransson Karin Ekstr?m Smedby Jesper Jurlander Gunnar Juliusson Fred Davi Kostas Stamatopoulos Richard Rosenquist 《Haematologica》2010,95(12):2072-2079
Background
Numerous subsets of patients with chronic lymphocytic leukemia display similar immunoglobulin gene usage with almost identical complementarity determining region 3 sequences. Among IGHV4-34 cases, two such subsets with “stereotyped” B-cell receptors were recently identified, i.e. subset #4 (IGHV4-34/IGKV2-30) and subset #16 (IGHV4-34/IGKV3-20). Subset #4 patients appear to share biological and clinical features, e.g. young age at diagnosis and indolent disease, whereas little is known about subset #16 at a clinical level.Design and Methods
We investigated the global gene expression pattern in sorted chronic lymphocytic leukemia cells from 25 subset/non-subset IGHV4-34 patients using Affymetrix gene expression arrays.Results
Although generally few differences were found when comparing subset to non-subset 4/16 IGHV4-34 cases, distinct gene expression profiles were revealed for subset #4 versus subset #16. The differentially expressed genes, predominantly with lower expression in subset #4 patients, are involved in important cell regulatory pathways including cell-cycle control, proliferation and immune response, which may partly explain the low-proliferative disease observed in subset #4 patients.Conclusions
Our novel data demonstrate distinct gene expression profiles among patients with stereotyped IGHV4-34 B-cell receptors, providing further evidence for biological differences in the pathogenesis of these subsets and underscoring the functional relevance of subset assignment based on B-cell receptor sequence features. 相似文献106.
Tabarsi P Marjani M Mansouri N Farnia P Boisson-Dupuis S Bustamante J Abel L Adimi P Casanova JL Mansouri D 《Journal of clinical immunology》2011,31(4):537-539
A 33-year-old man was admitted in hospital due to fever, generalized lymphadenopathy, and hepatosplenomegaly. He had a history
of anti-tuberculosis treatment in the previous 3 years. Despite normal chest radiograph, a sputum sample was smear-positive
for acid-fast bacilli, and polymerase chain reaction was positive for Mycobacterium tuberculosis complex. Drug susceptibility test revealed resistance to isoniazid and rifampin. Evaluation of the patient’s immune system
revealed IL-12Rβ1 deficiency. The patient died of disseminated tuberculosis (TB), despite appropriate antibiotic treatment.
This is the first IL-12 receptor-deficient patient presenting with disseminated TB in adulthood, without any previous relevant
medical history. This diagnosis should be considered in selected adult patients with unexplained, overwhelming TB. IL-12Rβ1
deficiency is a genetic etiology of severe TB in adults and should be considered in adult patients with disseminated TB. 相似文献
107.
Bidaki EZ Zargari F Mansouri P Malekian A Najafizade P 《Journal of medical engineering & technology》2011,35(3-4):154-160
Psoriasis is an autoimmune skin disease, afflicting skin with red plaques that are usually accompanied by silvery-white scales. Various medical treatments are used, with different impacts on the patients, but there is no definite cure for the disease. The PASI standard is employed to measure the performance of the treatments. It includes four parameters, namely area, erythema, scaliness and skin thickness. The PASI parameters are usually measured manually by physicians through subjective clinical observations which are imprecise, time consuming and in some cases lead to diverse results. This paper presents a computer-based automatic method to measure the area parameter in the PASI standard. In the proposed method, the YCbCr colour space is used to differentiate the plaques from the skin by applying an optimal threshold method. Performance evaluation results indicate that the proposed method is able to determine lesion areas with accuracy higher than 96% for 18 out of 20 cases and higher than 92% for another case. As well as high accuracy the proposed method has another advantage over previous methods: it can automatically detect plaques with silvery-white scales, plaques on hairy skins and tiny plaques, as well as simple (scale-less) plaques. 相似文献
108.
Soleimanifar N Amirzargar AA Mahmoudi M Pourfathollah AA Azizi E Jamshidi AR Rezaei N Tahoori MT Bidad K Nikbin B Nicknam MH 《Inflammation》2011,34(6):707-712
Ankylosing spondylitis (AS) is a chronic inflammatory disease, characterized by axial arthritis in which the genetic-environmental factors seem to be involved in the pathogenesis of the disease. This study was performed to investigate the role of polymorphisms of the programmed cell death 1 (PDCD1) gene on susceptibility to AS. In this study, 161 Iranian patients with AS and 208 normal controls were enrolled; two single-nucleotide polymorphisms (SNPs) of the PDCD1 gene PD-1.3 (G, A) in nucleotide position +7146 of intron 4 and PD-1.9 (C, T) in nucleotide +7625 of exon 5 were studied. Analysis of PD-1.3 revealed that 82% of patients and 79% of controls had GG genotype, while GA and AA genotypes were detected in 17% and 0.6% of patients, respectively, and 20% and 1.4% of controls, respectively. Moreover, the genotype CC (PD-1.9) was present in 92% of patients and 97% of controls. Although these differences were not statistically significant between patients and controls, comparisons of genotypes frequencies in the AS patients, based on human leukocyte antigen (HLA)-B27, revealed that all patients who had CT genotype (PD-1.9) were HLA-B27 positive, whereas 30% of patients with CC genotype were HLA-B27 negative. There was no evidence of association for PDCD1 SNPs with AS in our study, but CT genotype (PD-1.9) seems to be associated with HLA-B27 positivity in the patients with AS. 相似文献
109.