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111.
112.
Aghasizadeh Malihe Safarian Hamideh Haqhani Mohamad Avan Amir Kazemi Tooba Ferns Gordon A. Esmaily Habibollah Miri-Moghaddam Ebrahim Ghayour-Mobarhan Majid 《Biochemical genetics》2022,60(2):738-754
Biochemical Genetics - There is a strong genetic predisposition to cardiovascular disease (CVD). Loss-of-function variants of the angiopoietin-like 3 (ANGPTL3) gene have been reported to be... 相似文献
113.
Mohammad Alidoosti Mojtaba Salarifar Ali Mohammad Haji Zeinali Seyed Ebrahim Kassaian Maria Raissi Dehkordi 《BMC cardiovascular disorders》2007,7(1):1-8
Background
There have been few prospective studies examining the utility of routine exercise treadmill testing (ETT) early after percutaneous coronary intervention (PCI). The objective of this study was to examine the impact of a routine ETT strategy early after PCI on follow-up cardiac events and procedures.Methods
We examined 136 patients who underwent routine ETT at 6 weeks post-PCI in the ADORE trial. The ETT was classified as positive, indeterminate, or negative. The Duke Treadmill Score (DTS) was calculated for all patients. Follow-up occurred at 9 months.Results
ETT results at 6 weeks were: 32 (23.5%) positive, 24 (17.6%) indeterminate and 80 (58.8%) negative. At 9 months, the composite event rate was 21.9% in those with a positive ETT, 20.8% in those with an indeterminate ETT and 12.5% in those with a negative ETT (p = 0.25 positive vs. negative ETT). The sensitivity of early ETT for predicting clinical events was 41.2%, the specificity was 73.3%, the positive predictive value was 21.9% and the negative predictive value was 87.5%. At 9 months, the cardiac procedure rate was 18.8% in those with a positive test, 13.0% in those with an indeterminate test, and 6.3% in those with a negative test (p = 0.07 positive vs. negative ETT). In a multivariate logistic regression model, coronary stenting during PCI and a ≥ 85% MPHR achieved were found to be inversely associated with clinical events. However, the DTS did not independently predict clinical events.Conclusion
Although the statistical power of the study was limited by the small number of clinical events (particularly MI and death), the results of this study support the ACC/AHA guidelines that exercise treadmill testing should not be used routinely after PCI. 相似文献114.
Marjan Khalili Mahani Nobuyuki Inomata Alireza Saboori Baraldin Ebrahim Sayed Tabatabaei Hiroko Ishiyama Ardeshir Ariana Alfred E. Szmidt 《Experimental & applied acarology》2009,48(4):273-289
Allothrombium
pulvinum Ewing is a common natural enemy of aphids and some other arthropods. So far, there are no studies that have addressed genetic
variation of this predatory mite. We investigated genetic variation of A. pulvinum across its whole known range in Iran. A 410 bp portion of the mitochondrial cytochrome c oxidase subunit I gene (coxI) and 797–802 bp portion of the internal transcribed spacer 2 of rDNA (ITS2) were sequenced for 55 individuals from 11 populations, resulting in 12 and 26 haplotypes, respectively. In the coxI region, haplotype and nucleotide diversities varied among populations from 0.00 to 0.90 and from 0.0000 to 0.0110, respectively.
In the ITS2 region they varied from 0.20 to 0.91 and from 0.0006 to 0.0023, respectively. For both gene regions the highest haplotype
and nucleotide diversities were detected in population Mahmoud Abad from northern Iran. Statistically significant population
differentiation (F
ST) was detected in most pair-wise population comparisons. The results of population differentiation for both gene regions were
generally congruent indicating that A. pulvinum from Iran consists of genetically different populations. This suggests that A. pulvinum comprises at least two geographically distinct populations or even more than one species. This study is an initial step towards
understanding genetic variation of A. pulvinum, a taxon for which little molecular information is available. More intensive sampling and analysis of additional DNA regions
are necessary for more detailed classification of this taxon. 相似文献
115.
Zahra B. Mokhtari-Hosseini Ebrahim Vasheghani-Farahani Ali Heidarzadeh-Vazifekhoran S. Abbas Shojaosadati Ramin Karimzadeh Kianoush Khosravi Darani 《Bioresource technology》2009,100(8):2436-2443
Media components were optimized by statistical design for cell growth and PHB production of Methylobacterium extorquens DSMZ 1340. Four important components of growth media were optimized by central composite design. The growth increased from an OD = 1.35 for Choi medium as control to an OD = 2.15 for optimal medium. Then media components for PHB production were optimized. Optimization of five important factors was conducted by response surface method. The optimal composition of PHB production medium was found to be at 7.8 (g/L) Na2HPO4 · 12H2O, and surprisingly at zero concentration of (NH4)2SO4, KH2PO4, MgSO4 and MnSO4. The PHB production was found to be 2.95 (g/L) at this medium. RSM results indicated that a deficiency of nitrogen and magnesium is crucial for PHB accumulation in this microorganism. Also, PHB production was carried out in a 5 L fermentor at the optimum condition which resulted in 9.5 g/L PHB and 15.4 g/L cell dry weight with 62.3% polymer content. 相似文献
116.
Josef Böhm Lisa Koinig Ebrahim Razzazi-Fazeli Anja Blajet-Kosicka Magda Twaruzek Jan Grajewski Christiane Lang 《Mycotoxin Research》2010,26(3):147-153
The aim of the present study was to investigate the occurrence of mycotoxins in commercial dog food, as a basis to estimate
the risk of adverse effects. Seventy-six dry dog food samples from 27 producers were purchased from retail shops, supermarkets,
and specialized pet food shops in Vienna, Austria. The frequency and levels of deoxynivalenol (DON), zearalenone (ZEA), fumonisins
(FUM), ochratoxin A (OTA). and aflatoxins (AF) in dry dog food were determined. Mycotoxin analysis were performed by commercial
enzyme-linked immunosorbent assay (ELISA) test kits. Confirmatory analyses were done for DON, ZEA, and FUM by high performance
liquid chromatography (HPLC) after extract clean-up with immunoaffinity columns. The correlations between ELISA and HPLC results
for DON and ZEA were acceptable and indicated that ELISA could be a simple, low cost, and sensitive screening tool for mycotoxins
detection, contributing to quality and safety of pet food. DON was the mycotoxin most frequently found (83% positives; median
308 μg/kg, maximum 1,390 μg/kg). ZEA (47% positives, median 51 μg/kg and maximum 298 μg/kg) and FUM (42% positives, median
122 μg/kg and maximum 568 μg/kg) were also frequently detected in dog food. OTA was less frequently found (5%, median 3.6 μg/kg,
maximum 4.7 μg/kg. AF were not detected (<0.5 μg/kg) in any sample. The results show that dry dog food marketed in Vienna
are frequently contaminated with mycotoxins (DON > ZEA > FUM > OTA) in low concentrations, but do not contain AF. The high
frequency of Fusarium toxins DON, ZEA, and FUM indicates the need for intensive control measures to prevent mycotoxins in dog foods. The mycotoxin
levels found in dry dog food are considered as safe in aspects of acute mycotoxicoses. However, repeated and long-time exposure
of dogs to low levels of mycotoxins may pose a health risk. 相似文献
117.
Renaud Léonard Nicole Wopfner Martin Pabst Johannes Stadlmann Bent O. Petersen Jens ?. Duus Martin Himly Christian Radauer Gabriele Gadermaier Ebrahim Razzazi-Fazeli Fatima Ferreira Friedrich Altmann 《The Journal of biological chemistry》2010,285(35):27192-27200
Art v 1, the major pollen allergen of the composite plant mugwort (Artemisia vulgaris) has been identified recently as a thionin-like protein with a bulky arabinogalactan-protein moiety. A close relative of mugwort, ragweed (Ambrosia artemisiifolia) is an important allergen source in North America, and, since 1990, ragweed has become a growing health concern in Europe as well. Weed pollen-sensitized patients demonstrated IgE reactivity to a ragweed pollen protein of apparently 29–31 kDa. This reaction could be inhibited by the mugwort allergen Art v 1. The purified ragweed pollen protein consisted of a 57-amino acid-long defensin-like domain with high homology to Art v 1 and a C-terminal proline-rich domain. This part contained hydroxyproline-linked arabinogalactan chains with one galactose and 5 to 20 and more α-arabinofuranosyl residues with some β-arabinoses in terminal positions as revealed by high field NMR. The ragweed protein contained only small amounts of the single hydroxyproline-linked β-arabinosyl residues, which form an important IgE binding determinant in Art v 1. cDNA clones for this protein were obtained from ragweed flowers. Immunological characterization revealed that the recombinant ragweed protein reacted with >30% of the weed pollen allergic patients. Therefore, this protein from ragweed pollen constitutes a novel important ragweed allergen and has been designated Amb a 4. 相似文献
118.
Meiotic restitution is considered to be a common mechanism of polyploidization in plants and hence is one of the most important
processes in plant speciation. Meiotic behaviour of plant chromosomes is influenced by both genetic and environmental factors.
In this study, the meiotic behaviour of cereal crops was investigated, which includes tetraploid wheat genotypes (with and
without the meiotic restitution trait) and their derivates (synthetic hexaploid wheats and a doubled haploid (DH) line), grown
at two planting dates in the field. In addition, two local landraces of emmer wheat (Triticum turgidum ssp. dicoccum), one wheat cultivar (Chinese spring), one DH triticale cultivar (Eleanor) and one rye accession were included. Immature
spikes of mid-autumn and end-winter sowing plants were collected in April and May 2008, respectively, fixed in Carnoy’s solution
and stained with hematoxylin. Pollen mother cells (PMCs) from anthers at different stages of meiotic process were analysed
for their chromosomal behaviour and irregularities. Meiotic aberrations such as laggards, chromosome bridges, micronuclei,
abnormal cytokines, chromatin pulling and meiotic restitution were observed and the studied genotypes were accordingly ranked
as follows: triticale > synthetic hexaploid wheats > tetraploid wheats possessing meiotic restitution > tetraploid wheats
lacking meiotic restitution > rye. The results indicated that the samples that had been planted in the autumn, thus experiencing
an optimum temperature level at the flowering stage, exhibited less meiotic irregularities than winter planting samples that
encountered heat stress at the flowering period. 相似文献
119.
Adeleh Taei Hamid Gourabi Ali Seifinejad Mehdi Totonchi Ebrahim Shahbazi Mojtaba Rezazadeh Valojerdi Poopak Eftekhari Leila Karimian Hossein Baharvand 《In vitro cellular & developmental biology. Animal》2010,46(3-4):395-402
In this study, we focused on the derivation of human embryonic stem cell (hESC) from preimplantation genetic screening (PGS)-analyzed and preimplantation genetic diagnosis (PGD)-analyzed embryos. Out of 62 fresh PGD/PGS-analyzed embryos, 22 embryos reached the blastocyst stage. From 12 outgrowth blastocysts, we derived four hESC lines onto a feeder layer. Surprisingly, karyotype analysis showed that hESC lines derived from aneuploid embryos had diploid female karyotype. One hESC line was found to carry a balanced Robertsonian translocation. All the cell lines showed hESC markers and had the pluripotent ability to differentiate into derivatives of the three embryonic germ layers. The established lines had clonal propagation with 22–31% efficiency in the presence of ROCK inhibitor. These results further indicate that hESC lines can be derived from PGD/PGS-analyzed embryos that are destined to be discarded and can serve as an alternative source for normal euploid lines. 相似文献
120.
Christine Klinglmayr Katharina Nöbauer Ebrahim Razzazi-Fazeli Margit Cichna-Markl 《Journal of chromatography. B, Analytical technologies in the biomedical and life sciences》2010,878(2):187-193
The paper describes the determination of deoxynivalenol (DON) in 55 wheat food and feed samples, 26 from conventional and 29 from organic production. Immunoaffinity columns prepared by entrapping anti-DON antibodies by the sol–gel method were used for sample clean-up. DON was quantified by high performance liquid chromatography (HPLC) and ultraviolet (UV) detection. In general, the incidence of DON contamination was rather low. In eight samples (14.5%) the DON concentration was above the LOQ (380 ng/g), in six samples (10.9%) DON was detected but could not be quantified (>LOD (200 ng/g), <LOQ). In seven conventional samples (two pasta, two cookie, two snack and one feed sample) but only in one organic sample (a snack) the DON concentration was >LOQ. The data indicate both a higher incidence of DON contamination and higher DON concentrations in food and feed samples from conventional than in those from organic production. 相似文献