کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
866643 1470975 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A highly sensitive immunosensor for calmodulin assay based on enhanced biocatalyzed precipitation adopting a dual-layered enzyme strategy
ترجمه فارسی عنوان
یک ایمونسونسور حساس برای سنجش کالمدولین بر اساس افزایش بیو کاتالیزوری با اتخاذ استراتژی آنزیمی دو لایه
کلمات کلیدی
ایمونوسنسور، کالمدولین، بارش بیو کاتالیزوری، سرطان
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A highly sensitive immunosensor adopting a dual-layered enzyme strategy was proposed.
• This immunosensor exhibited satisfactory analytical performances for CaM detection.
• It was successfully applied to the CaM analysis in two cancer cells (HepG2 and MCF-7) with high sensitivity, which has shown great potency for cancer study.

Calmodulin (CaM) is a ubiquitous protein in eukaryotic cells, and it plays an important role in cancer progression. In this paper, a highly sensitive immunosensor adopting a dual-layered enzyme strategy was proposed for electrochemical detection of CaM. This immunosensor was constructed by introducing honeycomb-like mesoporous carbon (HMPC) as a sensor platform to sequentially immobilize antibody (Ab1), CaM and a multi-functionalized label. The label (HRP-PAupc-Ab1) was synthesized by covalently binding Ab1 and horseradish peroxidase (HRP) to poly(acrylic acid)-functionalized Au popcorn (PAupc) nanoparticles. A novel dual-layered enzyme strategy was employed by incubating HRP-secondary antibody (HRP-Ab2) onto the label surface and the enhanced biocatalyzed precipitation was therefore induced. This immunosensor exhibited satisfactory analytical performances for CaM detection with a linear response ranging from 5.0 pg mL−1 to 100 ng mL−1 and a detection limit of 1.5 pg mL−1. The immunosensor has also been successfully applied to the CaM analysis in two cancer cells (HepG2 and MCF-7) with high sensitivity, which has shown great potency for cancer study.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 56, 15 June 2014, Pages 258–263
نویسندگان
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