Biomedical and Electrical Engineer with interests in information theory, evolution, genetics, abstract mathematics, microbiology, big history, IndieWeb, mnemonics, and the entertainment industry including: finance, distribution, representation
@heml There's even a group working on education related uses: https:/
#edtech
@Joseph_Koivisto @edsu I would also encourage you to think about potentially proposing an Edu-focused session that Saturday to help get a broader conversation going around IndieWeb and education: https:/
#edtech #higherED
Thanks Richard, this reminds me that I've been meaning to delve back into some of the blogroll functionality hiding within my WordPress install. It's not as updated as it should be, but you can find mine at http:/
You're also sure to find a handful of interesting tidbits at http:/
If you're looking for a relatively full-featured RSS reader for WordPress, I highly recommend the PressForward [http:/
I don't think he'd linked to it, but Colin Walker has a "beta" webmention plugin he built for his functionality which is on Github: https:/
I love this thread about politics and education. Especially Simon's response.
https:/
Some #indieweb resources for pedagogy and education https:/
@cleverdevil If you're going to do a tweetstorm, then you should do it so that you still own all of the content at the end. http:/
Aggregating it at the end for easier reading isn't just a bonus feature.
I've written a tad about tweetstorms as they relate to journalism and better aggregation which covers some of this area too: http:/
@ToDiaspora @withknown As a business they're targeting education for that as it's a fantastic tool for cross collaboration.
Real-time MRI for precise and predictable intra-arterial stem cell delivery to the central nervous system
An MRI shows stem cells labeled with iron oxide nanoparticles being injected into an animal’s brain. Click to view video. (Credit: Piotr Walczak/Johns Hopkins Medicine)
Working with animals, a team of scientists reports it has delivered stem cells to the brain with unprecedented precision by threading a catheter through an artery and infusing the cells under real-time MRI guidance.
In a description of the work, published online Sept. 12 in the Journal of Cerebral Blood Flow and Metabolism, they express hope that the tests in anesthetized dogs and pigs are a step toward human trials of a technique to treat Parkinson’s disease, stroke, and other brain damaging disorders.
“Although stem cell-based therapies seem very promising, we’ve seen many clinical trials fail. In our view, what’s needed are tools to precisely target and deliver stem cells to larger areas of the brain,” says Piotr Walczak, M.D., Ph.D., associate professor of radiology at the Johns Hopkins University School of Medicine’s Institute for Cell Engineering. The therapeutic promise of human stem cells is derived from their ability to develop into any kind of cell and, in theory, regenerate injured or diseased tissues ranging from the insulin-making islet cells of the pancreas that are lost in type 1 diabetes to the dopamine-producing brain cells that die off in Parkinson’s disease.
Ten years ago, Shinya Yamanaka’s research group in Japan raised hopes further when it developed a technique for “resetting” mature cells, such as skin cells, to become so-called induced pluripotent stem cells. That gave researchers an alternative to embryonic stem cells that could allow the creation of therapeutic stem cells that matched the genetic makeup of each patient, greatly reducing the chances of cell rejection after they were infused or transplanted. But while induced pluripotent stem cells have enabled great strides forward in research, Walczak says they are not yet approved for any treatment, and barriers to success remain.
In a bid to address once such barrier – how to get the cells exactly where needed and no place else – Walczak and his colleague Miroslaw Janowski, M.D., Ph.D., assistant professor of radiology, sought a way around strategies that require physicians to puncture patients’ skulls or inject them intravenously. The former, Walczak says, is not only unpleasant, but also only allows delivery of stem cells to one limited place in the brain. In contrast, injecting cells intravenously scatters the cells throughout the body, with few likely to land where they’re most needed, says Walczak.
“Our idea was to do something in between,” says Janowski, using intra-arterial injection, which involves threading a catheter, or hollow tube, into a blood vessel, usually in a leg, and guiding it to a vessel in a hard-to-reach spot like the brain. The technique currently is used mainly to repair large vessels in the brain, says Janowski, but the research team hoped it might also be used to get stem cells to the exact place where they were needed. To do that, they would need a way of monitoring the catheter placement and movement of implanted cells in real time.
Walczak and Janowski teamed with colleagues including Monica Pearl, M.D., an associate professor of radiology practicing in the Division of Interventional Neuroradiology, who specializes in intra-arterial procedures. Usually the procedure is performed using an X-ray image as a guide, but that approach ruled out watching injected stem cells’ movements and making adjustments in real time.
In their experiments, after placing the catheter under X-ray guidance, they transferred anesthetized dog and pig subjects to an MRI machine, where images were taken every few seconds throughout the procedure. Once the catheter was in the brain, Pearl pre-injected small amounts of a harmless contrast agent that included iron oxide and could be detected on the MRI. “By using MRI to see in real time where the contrast agent went, we could predict where injected stem cells would go and make adjustments to the catheter placement, if needed,” says Janowski. Adds Jeff Bulte, Ph.D., a professor of radiology who participated in the study, “It’s like having GPS guidance in your car to help you stay on the right route, instead of only finding out you’re lost when you arrive at the wrong place.”
The team then injected both small stem cells (glial progenitor cells from the brain) and large mesenchymal stem cells from bone marrow into the animals under MRI, and found that in both cases, the pre-injected contrast agent and MRI allowed them to accurately predict where the cells would end up. They could also tell whether clumps of cells were forming in arteries and, if so, possibly intervene to avoid letting the clumps grow large enough to cut off blood flow and pose a danger. “If further research confirms our progress, we think this procedure could be a big step forward in precision medicine, allowing doctors to deliver stem cells or medications exactly where they’re needed for each patient,” says Walczak. The research team is planning to test the procedure in animals as a treatment for stroke and cancer, delivering both medications and stem cells while the catheter is in place.
Other authors on the paper are Joanna Wojtkiewicz, Aleksandra Habich, Piotr Holak, Zbigniew Adamiak and Wojciech Maksymowicz of the University of Warmia and Mazury in Poland; Adam Nowakowski and Barbara Lukomska of the Mossakowski Medical Research Center in Poland; Jiadi Xu of the Kennedy Krieger Institute; and Moussa Chehade and Philippe Gailloud of the Johns Hopkins University.
The study was funded by the National Institute of Neurological Disorders and Stroke (grant numbers NS076573, NS045062, NS081544), the Maryland Stem Cell Research Fund, the Department of Defense (grant number PT120368), the Polish National Science Centre (grant number NCN 2012/07/B/NZ4/01427), the National Centre for Research and Development, and a Mobility Plus Fellowship from the Polish Ministry of Science and Higher Education.
Caltech glassblower's retirement has scientists sighing http:/
@evelynjlamb I know of the generally excellent book you're describing (which was written in the last decade, for one of the other commenters). (Coincidentally, I'll note that I passed it along to a female colleague after I'd read it.) Though I don't know the author personally--despite having corresponded with him briefly in the past, I too would tend to give him the benefit of the doubt, particularly as he was dean of faculty at an all women's college where he spent nearly three decades and is credited with diversifying the faculty in addition to organizing for Women’s Education Worldwide.
We can all certainly be more cognizant in the writing process to expunge our unacknowledged biases. Perhaps this type of review is something we might all attempt when giving peer-review to our colleagues' work?
Nobel Laureate Carl Wieman's Education Plea: Revolutionize Teaching : NPR Ed http:/
Great answer to "Why do professors teach 1 + 1 and then ask you 19.8 * 76 in exams?" https:/
Brief reply to: Is majoring in liberal arts a mistake for students? https:/
What magisterial sounding pontification! Sadly, it’s not much different than the early philosophies of Socrates and Plato or many of the other early progenitors of the humanities and liberal arts. I get the impression that the author hasn’t read much philosophy and has not much grounding in the liberal arts. While I agree with the spirit in which the piece is written, I find it deplorable that there aren’t what should be obligatory mentions of words like trivium, quadrivium, or philosophy, but rather the corpus of work in which the author seems steeped is that of only modern day authors of popular science (Pinker, Gladwell, Kahneman, et. al.) who have some interesting viewpoints, but ones which require at least a grounding in the liberal arts to pick apart. Several times Khosla demeans the liberal arts and uses the repeated example that a reader should be able to pick apart and think critically about articles in The Economist. To do this requires a knowledge of logic and rhetoric which are two of the pillars of what? — yes, the liberal arts!
He also seems unaware of big movements within the humanities and sciences like Bill Gates and David Christian’s Big History Project which are going a long way towards providing a more balanced education in history, economics, physics, chemistry, biology and evolution. I find here, no prima facie evidence of his knowledge of Thomas Kuhn or Karl Popper, which might help win me to his argument. In all, aside from the passing references to one or two recent works, this entire argument is not much different from many that could have been written at the beginning of the industrial revolution. How blind so many must be to seemingly think there’s something new here.
Most appalling to me here is that the author doesn’t seem to give even a passing nod or small wink to C.P. Snow or “The Two Cultures” [http:/
Yes, we certainly need more emphasis on the quadrivium portion of the liberal arts, and in particular mathematics and critical thinking which seem to have been left by the wayside. It is deplorable that the highest extent of mathematics that 99% of college students are exposed to terminates in the 17th century for the most part. Sadly, many college students are left without the ability to think critically and deeply, not to mention the hordes of students in America who barely make it through high school and don’t attend college. One also only needs to skim through recent issues of Nature [http:/
Yes, we need far, far more, but alas, this poor article only touches the tip of the issue and it sadly only does so with less than half of the picture.