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Mendeteksi antibodi diagnostik HIV dengan mesin nano DNA

Sebuah mesin nano terdiri dari DNA sintetis  yang dapat digunakan untuk diagnosis cepat , sensitif dan murah dari banyak penyakit , termasuk HIV

Date:

October 7, 2015

Source:

University of Montreal

Summary:

Sebuah tim peneliti internasional telah merancang dan mensintesis skala nanometer DNA ' mesin ' yang modifikasi disesuaikan yang memungkinkan untuk mengenali antibodi target tertentu .

...... Pengikatan antibodi ke mesin DNA menyebabkan perubahan struktural ( atau switch ) , yang menghasilkan sinyal cahaya . Sensor tidak perlu diaktifkan secara kimia dan cepat – yang bertindak dalam waktu lima menit - memungkinkan antibodi ditargetkan akan mudah dideteksi , bahkan dalam sampel klinis kompleks seperti serum darah .....more

Detecting HIV diagnostic antibodies with DNA nanomachines

A nanoscale machine composed of synthetic DNA can be used for the rapid, sensitive and low-cost diagnosis of many diseases, including HIV

Date:

October 7, 2015

Source:

University of Montreal

Summary:

An international team of researchers have designed and synthesized a nanometer-scale DNA 'machine' whose customized modifications enable it to recognize a specific target antibody.

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New research may revolutionize the slow, cumbersome and expensive process of detecting the antibodies that can help with the diagnosis of infectious and auto-immune diseases such as rheumatoid arthritis and HIV. An international team of researchers have designed and synthetized a nanometer-scale DNA "machine" whose customized modifications enable it to recognize a specific target antibody. Their new approach, which they described this month in Angewandte Chemie, promises to support the development of rapid, low-cost antibody detection at the point-of-care, eliminating the treatment initiation delays and increasing healthcare costs associated with current techniques.

The binding of the antibody to the DNA machine causes a structural change (or switch), which generates a light signal. The sensor does not need to be chemically activated and is rapid -- acting within five minutes -- enabling the targeted antibodies to be easily detected, even in complex clinical samples such as blood serum.

"One of the advantages of our approach is that it is highly versatile," said Prof. Francesco Ricci, of the University of Rome, Tor Vergata, senior co-author of the study. "This DNA nanomachine can be in fact custom-modified so that it can detect a huge range of antibodies, this makes our platform adaptable for many different diseases."

"Our modular platform provides significant advantages over existing methods for the detection of antibodies," added Prof. Vallée-Bélisle of the University of Montreal, the other senior co-author of the paper. "It is rapid, does not require reagent chemicals, and may prove to be useful in a range of different applications such as point-of-care diagnostics and bioimaging."

"Another nice feature of our this platform is its low-cost," said Prof. Kevin Plaxco of the University of California, Santa Barbara. "The materials needed for one assay cost about 15 cents, making our approach very competitive in comparison with other quantitative approaches."

"We are excited by these preliminary results, but we are looking forward to improve our sensing platform even more" said Simona Ranallo, a PhD student in the group of Prof. Ricci at the University of Rome and first-author of the paper. "For example, we could adapt our platform so that the signal of the nanoswitch may be read using a mobile phone. This will make our approach really available to anyone! We are working on this idea and we would like to start involving diagnostic companies."

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Story Source:

The above post is reprinted from materials provided byUniversity of Montreal. Note: Materials may be edited for content and length.

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Journal Reference:

1.    Simona Ranallo, Marianna Rossetti, Kevin W. Plaxco, Alexis Vallée-Bélisle, Francesco Ricci. A Modular, DNA-Based Beacon for Single-Step Fluorescence Detection of Antibodies and Other Proteins. Angewandte Chemie, 2015; DOI: 10.1002/ange.201505179

http://www.sciencedaily.com/releases/2015/10/151007033233.htm

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