Search Results

1 - 5 of 5 items

  • Author: Ting-Ting Zhu x
Clear All Modify Search
Screening of early diagnostic markers of gentamicin-induced acute kidney injury in canines

Abstract

Introduction

The value of neutrophil gelatinase-associated lipocalin (NGAL), kidney injury molecule-1 (Kim-1), and liver-type fatty acid binding protein (L-FABP) was assessed in early diagnosis of gentamicin-induced acute kidney injury (AKI) in dogs.

Material and Methods

Subcutaneous gentamicin injection in 16 healthy adult beagles made the AKI model. Blood was sampled every 6 h to detect NGAL, Kim-1, L-FABP, and serum creatinine (SCr) concentrations. Kidney tissue of two dogs was taken before the injection, as soon as SCr was elevated (78 μmol/L), and when it had risen to 1.5 times the baseline, and haematoxylin-eosin staining and transmission electron microscopy (TEM) were used to observe changes.

Results

NGAL, Kim-1, and SCr levels were significantly increased (P < 0.05) at 18, 30, and 78 h post injection, but L-FABP concentration was not associated with renal injury. At the earliest SCr elevation stage, findings were mild oedema, degeneration, and vacuolisation in renal tubular epithelial cells in pathology, and mild cytoplasmic and mitochondrial oedema in TEM. At this time point, NGAL and Kim-1 concentrations were significantly increased (P < 0.05), indicating that these two molecules biomark early kidney injury in dogs. Using receiver operating characteristic curve analysis, their warning levels were > 25.31 ng/mL and > 48.52 pg/mL.

Conclusion

Plasma NGAL and Kim-1 above warning levels are early indicators of gentamicin-induced AKI in dogs.

Open access
Reactive bay functionalized perylene monoimide-polyhedral oligomeric silsesquioxane organic electronic dye

Abstract

Aggregation-induced quenching is particularly detrimental in perylene diimides, which are characterized by a near-unity fluorescence quantum yield in solution but are far less emissive in the solid state. Previously, perylene diimide has been improved by linking it to the inorganic cage of polyhedral oligomeric silsesquioxanes. As a further study on perylene diimidepolyhedral oligomeric silsesquioxanes, we report on a double functionalized molecular structure, which can be used for substitution at the bay area and as a side group in other materials. Typical solution absorption and emission features of the perylene diimide fragment have been observed in this new reactive perylene diimide-polyhedral oligomeric silsesquioxane. Moreover, reduced stacking during aggregation and spherical particles exhibiting solid fluorescence have been obtained. Organic semiconducting material with enhanced solid state photophysical properties, like solid fluorescence is a subject of great interest owing to its possible high-tech applications in optoelectronic devices.

Open access
Domain Ⅲ of Dengue Virus Serotype 2 Envelope: Expression at High Levels in Escherichia coli and Competitive Inhibition of Virus Entry

Abstract

Obejective The domain Ⅲ of dengue virus type 2 envelope was cloned and expressed in Escherichia coli and the recombinant protein inhibited virus effect was tested.

Methods In this study, the domain Ⅲ (DⅢ) protein of the dengue virus type-2 (DENV-2) envelope (E) antigen was expressed in Escherichia coli by fusion with a carrier protein. The protein was purified using enzymatic cleavage and affinity purification. Rabbit immunization and antibody detection was carried out. Inhibition of DENV-2 infection was observed by DENV-2 EDⅢ protein and its immunity rabbits serum.

Results The recombinant expression DENV-2 EDⅢ protein plasmid was constructed successfully. After isopropyl thiogalactoside induction, a specific soluble 29 kD protein was obtained, and the expression product accounted for 68.87% of the total protein of the cell lysate. Western blotting demonstrated the reactivity of the recombinant protein with his-tag and DENV (Ⅰ-Ⅳ) monoclonal antibodies. The protein was purified using enzymatic cleavage and affinity purification. The purified recombinant EDⅢ protein inhibited the entry of DENV-2 into BHK-21 cells. DENV-2 plaque neutralization assays were carried out using serially diluted antibodies against EDⅢ protein. At a 1:16 dilution, the antibodies produced at least 90% neutralization of the DENV-2 virus. Furthermore, the antibodies continued to exhibit high neutralization effects (approximately 80%) until the anti-EDⅢ antibody titer reached 1:1 024.

Conclusions DENV-2 EDⅢ was cloned and expressed successfully. DENV-2 EDⅢ protein could be useful in the development of inexpensive dengue vaccine. The data also suggested that DENV-2 employed an attachment molecule or receptor for its entry into C6/36 mosquito cells.

Open access
The Prevalence and Levels of Anti-HEV IgG in the Population of Jiangsu Province, China

Objective To investigate the prevalence and levels of anti-HEV IgG in the population of Jiangsu Province.

Methods Total of 2 656 samples from Qindong and 11 463 samples from Anfeng were colleted. The anti- HEV antibody was qualitatively and quantitatively detected using ELISA kits and the references had been established.

Results The positive rates of anti-HEV IgG in male and female were 55.6% and 40.1%, respectively. The positive rate of anti-HEV IgM in male and female were both 3.4%. In opposite to anti-HEV IgG, the positive rate of anti-HEV IgM in Anfeng was significant higher than that in Qindong. The mean anti-HEV IgG titers for 6 age groups were 0.94, 0.92, 1.07, 1.46, 1.27, 1.19 and 0.68, 1.31, 1.08, 1.14, 1.31, 1.68 IU/ml, in Qindong and Anfeng region, respectively. The positive rate of anti-HEV IgG tended to increase with age and the titer of anti- HEV IgG was associated with age (R > 0.90).

Conclusions The results in this study showed that HEV was widely prevalent in both Qindong and Anfeng of Jiansu Province and the prevalence and the anti-HEV IgG titer were associated with gender and age.

Open access