{"id":44145,"date":"2013-08-19T00:00:00","date_gmt":"2013-08-19T05:00:00","guid":{"rendered":"https:\/\/www.unmc.edu\/newsroom\/2013\/08\/19\/unmc-among-national-leaders-in-nanoimaging\/"},"modified":"2022-09-02T20:29:28","modified_gmt":"2022-09-03T01:29:28","slug":"unmc-among-national-leaders-in-nanoimaging","status":"publish","type":"post","link":"https:\/\/www.unmc.edu\/newsroom\/2013\/08\/19\/unmc-among-national-leaders-in-nanoimaging\/","title":{"rendered":"UNMC among national leaders in nanoimaging"},"content":{"rendered":"

First, Yuri Lyubchenko, Ph.D., professor of pharmaceutical science in the College of Pharmacy, has a question: Are you familiar with the concept of a record player?<\/p>\n

When the answer is “Yes,” Dr. Lyubchenko is relieved. So many students these days know only iPods, MP3s and streaming. They’ve never put a needle on vinyl.<\/p>\n

But that — a record-player needle — is the principle behind the atomic force microscope (AFM). <\/p>\n

In much the way a phonograph needle can decipher music in a record’s grooves, the AFM needle is sensitive enough to show very tiny details (nanometer scale) at incredibly high speeds.<\/p>\n

Among nine various AFM instruments, UNMC houses a unique atomic force microscope, high-speed AFM. This instrument is capable of the time-lapse nanoscale imaging with video rate.<\/p>\n


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\nUntil UC Berkley recently acquired a similar instrument, UNMC’s was the only one of its kind in the U.S. <\/p>\n

Yet it’s kept without fanfare at the College of Pharmacy, behind an ordinary (locked) door, housed in a closet-sized room. Chances are you haven’t even heard it’s on campus.<\/p>\n

But it allows Dr. Lyubchenko’s lab and others to do the kind of work that moves the needle — so to speak.<\/p>\n

It holds a unique capability to manipulate single molecules and measure their interaction. <\/p>\n

This property was especially important when looking into neurodegenerative disorders like Alzheimer’s, Huntington’s and Parkinson’s diseases. <\/p>\n

Those diseases are caused by the misfolding and aggregation of proteins. When misfolded states are probed with AFM-force spectroscopy, UNMC scientists are able to identify them and characterize their properties. Researchers are then able to see why this misfolding and aggregation is so devastating.<\/p>\n

See DNA unraveling, captured by the atomic force microscope.<\/b><\/a><\/p>\n

“The major finding,” said Dr. Lyubchenko, “is that a misfolding dimer has an extremely long lifetime.”<\/p>\n

A dimer is comprised of two bonded, structurally similar monomers, the building blocks of complex molecules.<\/p>\n

“The high stability of misfolded dimers is a fundamental finding, suggesting that the formation of dimers leads to enormous stabilization of the protein misfolded state.”<\/p>\n

Likewise, scientists know that the protein APOBEC3G can block HIV replication. But there are still many details to discover, in order to definitively determine the process. With the high-speed AFM technology, Dr. Lyubchenko and his team study the nanoscale structure and dynamics of APOBEC3G complexes with the DNA target.<\/p>\n

They can actually image what happens.<\/p>\n

UNMC scientists also are looking for ways to take advantage of AFM technologies in molecular pharmacology, drug design and other biomedical areas.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Yuri Lyubchenko, Ph.D., explores neurodegenerative disorders with the aid of atomic force 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