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#24739838   2014/04/17 Save this To Up

Early dengue diagnosis by nonstructural protein 1 antigen detection: Rapid immunochromotography versus two the enzyme-linked immunosorbent assay kits.

Dengue is known for its serious life-threatening complications. New rapid kits available recently in India target circulating non-structural protein (NS1) antigen from day one onwards. The sensitivity and specificity of a newly introduced rapid combo kit against two conventional ELISA kits is assessed. The performance of this kit is quite satisfactory since excellent agreement of 94.26% was observed with particular reference to NS1 antigen detection among all three kits namely Rapid SD Bioline dengue Duo (SD Korea), InBios DENV Detect NS1 ELISA, USA and dengue Early ELISA, Panbio, Australia. The false positivity of the rapid kit is very low since its specificity as for as NS1 antigen detection is concerned is 98.33%. The use of combination kit helps to detect additional cases of dengue, which are negative for NS1 antigen but positive for IgM and/or IgG antibodies, thus facilitating early diagnosis in remote areas and small laboratorie.

1929 related Products with: Early dengue diagnosis by nonstructural protein 1 antigen detection: Rapid immunochromotography versus two the enzyme-linked immunosorbent assay kits.

HCV NS3 1359 1456aa antig Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Dengue Virus Recombinant Measles Virus Recombinant Rubella Viral CellQuanti-Blue™ Cell V CellQuanti Blue™ Cell V

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#24737469   2014/04/16 Save this To Up

Study of Hgp44 from Porphyromonas gingivalis on inducing HUVECs to secrete IL-6 and IL-8.

The aim of this study was to clone, express the gene of Hgp44 in adhesin domains of gingipains from Porphyromonas gingivalis and purify the protein. Furthermore, the effect of Hgp44 from P. gingivalis on inducing HUVECs to secrete IL-6 and IL-8 was evaluated. The Hgp44 gene fragment was amplified by polymerase chain reaction, and then inserted into the cloning vector pMD18-T and linked with a prokaryotic expression vector pET22b to construct the recombinant expression plasmid pET22b-Hgp44. Fusion protein expression was induced by IPTG, and it was purified by immobilized metal-chelating affinity chromatography (IMAC) using an Ni(2+) matrix column. HUVECs were cultured in vitro and different concentrations of Hgp44 were added to confluent HUVEC monolayers and incubated for 2, 8 and 24 h. We extracted the supernatants and then used ELISA kits to test the changes in IL-6 and IL-8 levels. Finally, a 1100-bp fragment was successfully amplified, and the expression of the fusion protein was examined by SDS-PAGE and Western blot analysis, and the data showed that the protein was 44 kDa in size and expressed mostly in the form of inclusion bodies. The purification of the fusion protein was achieved using Ni(2+) affinity chromatography. About 3.5 mg/L fusion protein was obtained. Hgp44 could induce HUVECs to secrete IL-6 and IL-8 levels, which were remarkably increased. In a word, Hgp44 was successfully expressed in a prokaryotic expression system and purified by IMAC using the Ni(2+) matrix column. The effect of Hgp44 in inducing HUVECs to secrete IL-6 and IL-8 was demonstrated.

1391 related Products with: Study of Hgp44 from Porphyromonas gingivalis on inducing HUVECs to secrete IL-6 and IL-8.

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#24735628   2014/04/16 Save this To Up

[Protective effects of soybean isoflavone on human umbilical vein endothelial cell injury induced by H2O2 and lipopolysaccharide].

To investigate the protective effects and related mechanisms of soybean isoflavone (SI) on human umbilical vein endothelial cells (HUVECs) injury induced by H2O2 and lipopolysaccharide (LPS).

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#24734160   2014/04/15 Save this To Up

Toxoplasmosis as a complication of transfusion in hemodialysis patients.

Toxoplasma Gondi is an obligate intracellular protozoan parasite that is one of the most important protozoa of blood and tissue. The medical importance of this parasite is considered from two aspects of congenital defects and opportunities among those with congenital immune deficiency. Depending on the mode of transmission through blood and the risk of infection to Toxoplasma Gondi in hemodialysis patients, this serological study was conducted on Iranian population.

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#24732114   2014/4/15 Save this To Up

One-step kinetics-based immunoassay for the highly-sensitive detection of C-reactive protein in less than 30 minutes.

The article reveals a rapid sandwich enzyme-linked immunosorbent assay (ELISA) for the highly-sensitive detection of human C-reactive protein (CRP) in less than 30 min. It employs a one-step kinetics-based highly simplified and cost-effective sandwich ELISA procedure with minimum process steps. The procedure involves the formation of a sandwich immune complex on capture anti-human CRP antibody-bound Dynabeads(®) in 15 min followed by two magnet-assisted washings and one enzymatic reaction. The developed sandwich ELISA detects CRP in the dynamic range of 0.3-81 ng mL(-1) with a limit of detection and analytical sensitivity of 0.4 ng mL(-1) and 0.7 ng mL(-1), respectively. It detects CRP spiked in diluted human whole blood and serum with high analytical precision as confirmed by conventional sandwich ELISA. Moreover, the results of the developed ELISA for the determination of CRP in the ethylenediaminetetraacetic acid (EDTA) plasma samples of patients are in good agreement with those obtained by the conventional ELISA. The developed immunoassay has immense potential for the development of rapid and cost-effective in vitro diagnostic kits.

1152 related Products with: One-step kinetics-based immunoassay for the highly-sensitive detection of C-reactive protein in less than 30 minutes.

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#24719228   2014/4/10 Save this To Up

Anti-PR3 and anti-MPO antibodies are not present in sera of patients with pulmonary tuberculosis.

Anti-neutrophil cytoplasmic antibodies (ANCA) are autoantibodies directed to intracellular components of neutrophils and are present in several vasculitic syndromes. Recently, these autoantibodies have been described in other autoimmune disorders as well as in infectious diseases such as tuberculosis (TB). As there are some clinical similarities between TB and granulomatosis with polyangiitis, we searched for ANCA in a group of patients with proven TB. Patients with TB confirmed by chest X-ray and sputum bacilloscopy either before or within 30 days after beginning treatment were included in this study. Anti-MPO and anti-PR3 antibodies were studied using well-standardized ELISA kits (INOVA Diagnostics, Inc.). ANCA were also investigated by indirect immunofluorescence (IIF). Fifty TB patients (26 females, mean age 47.34 ± 17 years) were enrolled in the present study. No patient tested positive for ANCA by IIF, or anti-MPO or anti-PR3 antibodies by ELISA. Although previous studies have shown the presence of ANCA in some infectious diseases, the findings of the present study demonstrated the absence of such antibodies in TB. The discrepancy in the prevalence of ANCA in TB among different studies may be attributed to methodological factors and/or the genetic background of the studied populations.

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#24718301   2014/4/10 Save this To Up

A longitudinal study of circulating angiogenic and antiangiogenic factors and AT1-AA levels in preeclampsia.

Our earlier studies of preeclampsia (PE) at delivery have demonstrated the alteration of one carbon cycle, reduced placental omega 3 fatty acids, altered circulating levels of angiogenic factors and differential placental gene-specific methylation patterns of angiogenic factors. This study was undertaken to examine changes in the levels of angiogenic factors and angiotensin II type 1 receptor autoantibodies (AT1-AAs) throughout gestation, from early pregnancy until delivery, in women with PE and to examine their association with cord angiogenic factors, blood pressure and infant weight. A total of 81 pregnant women (46 normotensive and 35 with PE) were followed at three different time points during pregnancy: 16-20 weeks (T1), 26-30 weeks (T2) and at the time of delivery (T3). The plasma levels of angiogenic factors and AT1-AAs were determined in the maternal and cord plasma by commercial enzyme-linked immunosorbent assay kits. Maternal plasma levels of vascular endothelial growth factor (VEGF) and placental growth factor (PlGF) were lower (P<0.05 for both), whereas soluble fms-like tyrosine kinase-1 (sFlt-1; P<0.05) and the sFlt-1/PlGF ratio (P<0.01) were higher in early pregnancy in the PE group. Maternal plasma AT1-AA levels were higher (P<0.05) at T2 in women with PE. Cord plasma VEGF and soluble kinase insert domain receptor (sKDR) levels were lower (P<0.01 and P<0.05, respectively), whereas AT1-AA levels were higher (P<0.05) in the PE group. Maternal plasma VEGF levels in early pregnancy were positively associated with systolic blood pressure, whereas the sFlt-1/PlGF ratio at T2 was negatively associated with infant weight in the PE group. Low levels of proangiogenic factors (VEGF and PlGF) and high levels of AT1-AAs and antiangiogenic factors (sFlt-1 and sFlt-1/PlGF ratio) are present in the maternal circulation during early gestation in women with PE.Hypertension Research advance online publication, 10 April 2014; doi:10.1038/hr.2014.71.

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#24713176   2014/4/9 Save this To Up

Comparison of two automated immunoassays for the determination of Puumalavirus IgM and IgG.

Puumala virus (PUUV), a member of the genus hantavirus, can cause nephropathia epidemica, a mild form of haemorrhagic fever with renal syndrome. The method of choice for the serodiagnosis of hantavirus infections are enzyme-linked immunosorbent assays (ELISAs).

2857 related Products with: Comparison of two automated immunoassays for the determination of Puumalavirus IgM and IgG.

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#24709311   2014/4/15 Save this To Up

Anti-stress effect of astragaloside IV in immobilized mice.

Astragaloside IV, a major component extracted from the roots of Astragalus membranaceus (AM), possesses anti-inflammatory, anti-oxidative, anti-fibrotic, anti-infarction and immunoregulatory effects. To clarify anti-stress effect of AM, anxiolytic and anti-inflammatory effects of 80% ethanol extract of AM and astragaloside IV were investigated in immobilization stress model.

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#24709015   2014/04/08 Save this To Up

Abnormality in serum levels of mature brain-derived neurotrophic factor (BDNF) and its precursor proBDNF in mood-stabilized patients with bipolar disorder: A study of two independent cohorts.

Early detection and diagnosis of bipolar disorder can be difficult. Tools are needed to help clinicians detect bipolar disorder earlier, which would ameliorate the prognosis.

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