- تاریخ ایجاد در جمعه, 15 ارديبهشت 1391 11:38
ننو تکنولوژی در خدمات پزشکی : پتا نسیلی عظیم ، اما خطرات آن چیست ؟ ننو تکنولوژی ( Nanotechnology ) دگرگونی ماده در ا شل مولکولی و اتمی برای بوجود آوردن مواد دارای خصوصیا ت جدید و تنوع چشمگیر است. این تکنولوژی به سرعت در بخشهای مختلف از کاربرد های پزشکی تا سا ختمان سازی و الکترونیک در حال پیشرفت است. در امور درما نی انقلابی کردن تحویل دارو ، ژن ترا پی ، تشخیص بیماریها و خیلی از بخشهای تحقیقاتی ، توسعه و کاربردهای کلینکی را بشارت میدهد .
منبع خبر: medicalnewstoday.com
برای اطلاعات بیشتر به نسخه انگلیسی و یا سایت منبع خبر ( لینک زیر ) مراجعه کنید.
Written by Catharine Paddock PhD
Published: Friday 4 May 2012
Nanotechnology, the manipulation of matter at the atomic and molecular scale to create materials with remarkably varied and new properties, is a rapidly expanding area of research with huge potential in many sectors, ranging from healthcare to construction and electronics. In medicine, it promises to revolutionize drug delivery, gene therapy, diagnostics, and many areas of research, development and clinical application.
This article does not attempt to cover the whole field, but offers, by means of some examples, a few insights into how nanotechnology has the potential to change medicine, both in the research lab and clinically, while touching on some of the challenges and concerns that it raises.
What is Nanotechnology?
The prefix "nano" stems from the ancient Greek for "dwarf". In science it means one billionth (10 to the minus 9) of something, thus a nanometer (nm) is is one billionth of a meter, or 0.000000001 meters. A nanometer is about three to five atoms wide, or some 40,000 times smaller than the thickness of human hair. A virus is typically 100 nm in size.
The ability to manipulate structures and properties at the nanoscale in medicine is like having a sub-microscopic lab bench on which you can handle cell components, viruses or pieces of DNA, using a range of tiny tools, robots and tubes.
Therapies that involve the manipulation of individual genes, or the molecular pathways that influence their expression, are increasingly being investigated as an option for treating diseases. One highly sought goal in this field is the ability to tailor treatments according to the genetic make-up of individual patients.
This creates a need for tools that help scientists experiment and develop such treatments.
Imagine, for example, being able to stretch out a section of DNA like a strand of spaghetti, so you can examine or operate on it, or building nanorobots that can "walk" and carry out repairs inside cell components. Nanotechnology is bringing that scientific dream closer to reality.
For instance, scientists at the Australian National University have managed to attach coated latex beads to the ends of modified DNA, and then using an "optical trap" comprising a focused beam of light to hold the beads in place, they have stretched out the DNA strand in order to study the interactions of specific binding proteins