The vagal nerve could serve as conduit for transit of alpha-synuclein from appendix to brain.
Since about 2000 we’ve learned a lot about the bacteria in our guts. We’ve learned that the right bacterial communities in our gastrointestinal system can make us feel better, think better and even help avoid obesity (1). My colleague Isobel has previously blogged about how certain gut bacteria can improve immunotherapy outcomes.
Conversely, the wrong bacteria in our guts can have negative consequences on health and cognition.
Along the way we’ve learned that gut bacterial flora can be influenced by what we eat, certain medications like antibiotics, and even stressful events. We now know that fermented foods like yogurt, sauerkraut, kombucha and that horrible-smelling stuff (kimchi) that another colleague eats are happy food for the good gut bacteria.
And you might guess that fried foods, saturated fats and certain carbohydrates can support the growth of gut bacteria that are doing us no favors when present in large quantities in our gastrointestinal system. Continue reading
If you’re a student in a research lab, discussing career options with your PI can be a tricky topic to navigate. Whether real or perceived, many students feel they cannot bring up the subject of a career in industry with their PI because they will lose credibility as a serious researcher. In labs where thinking about careers outside of academia is taboo, students can’t get all the information they need to decide what career path is right for them.
This dilemma became very clear a few weeks ago when I served as a panelist for a career workshop about jobs in industry at the iGEM 2018 Giant Jamboree. The workshop participants were extremely engaged, and we fielded questions well after the official end time. Since I know there are other students who could benefit from information about science-related careers in industry, I’ve compiled some of the questions and answers from the workshop. Continue reading
Last month, several of my Promega colleagues and I attended the 2018 iGEM Giant Jamboree in Boston, MA. This annual event is the culmination of the International Genetically Engineered Machines competition, in which 350+ teams of high school, undergraduate and graduate students use synthetic biology to solve a problem they see in the world.
The iGEM Giant Jamboree is the closest I have ever come to a scientific utopia. For four days, several thousand students from 45 countries come together to share their experiences and discuss ways that science can change the world. They present impressive projects with real-world applications including human diagnostics and alternative energy. Collaboration and open science are among the core tenets of iGEM, and it’s not unusual to see three or more countries represented on the Collaborators slide at the end of a presentation. Each project also contains a public engagement component, which many teams fulfill with educational programs or partnerships with underrepresented communities. Continue reading
Long noncoding RNAs have been shown to regulate chromatin states, transcriptional activity and post transcriptional activity (1). Only a few studies have observed long non-coding RNAs modulating the translational process (2). The noncoding RNA BC200 has been shown to inhibit translation by interacting with the translation initiation factors, eIF4A and eIF4B.
To characterize how BC200 translational inhibition could be controlled, a variety of RNAs were transcribed/translated in vitro using the TNT system (Cat. #L4610) from Promega. To each transcription/translation reaction, BC900 RNA, hnRNPE1 and hnRNE2 proteins were added. Inhibition of BC200 activity was noted when proteins were successful expressed (3).
- Sosinska, P et.al. (2015) Intraperitoneal invasiveness of ovarian cancer from the cellular and molecular perspective. Ginekol. Pol. 86, 782–86.
- Geisler, S. and Coller, J. (2013) RNA in unexpected places: long non-coding RNA functions in diverse cellular contexts. Nat.Rev. Mol. Cell. Bio. 14,699–12.
- Jang, S. et. al. (2017) Regulation of BC200 RNA-mediated translation inhibition by hnRNP E1 and E2. FEBS Letters. 591, 393–5.
“The Coronation of the Virgin” tempera on panel by Fra Angelico [Public domain], via Wikimedia Commons
Chicken eggs are widely found in most grocery stores. They are a cheap and unassuming source of protein, easy to cook as you desire (e.g., fried, scrambled, hard boiled) or use as a binder for other food items (e.g., meatloaf, cakes, cookies). One reason I keep laying hens myself is not only for fresh eggs but also to have egg shells other colors than white, the predominant color sold in US grocery stores. However, did you know that eggs have uses that don’t end up in the stomach and instead, are a feast for the eyes? I was introduced to the concept of egg tempera, a medium used for painting, by my colleague, Karen Stakun, artist and manager of our graphics department during a discussion about chickens. I was intrigued by the concept. Continue reading
The rapid advancement of next-generation sequencing technology, also known as massively parallel sequencing (MPS), has revolutionized many areas of applied research. One such area, the analysis of mitochondrial DNA (mtDNA) in forensic applications, has traditionally used another method—Sanger sequencing followed by capillary electrophoresis (CE).
Although MPS can provide a wealth of information, its initial adoption in forensic workflows continues to be slow. However, the barriers to adoption of the technology have been lowered in recent years, as exemplified by the number of abstracts discussing the use of MPS presented at the 29th International Symposium for Human Identification (ISHI 29), held in September 2018. Compared to Sanger sequencing, MPS can provide more data on minute variations in the human genome, particularly for the analysis of mtDNA and single-nucleotide polymorphisms (SNPs). It is especially powerful for analyzing mixture samples or those where the DNA is highly degraded, such as in human remains. Continue reading
On October 9, the 2018 Wisconsin Biohealth Summit was held in Madison, WI, hosted by BioForward, an organization that supports the growth of the biohealth industry in the state. This day-long event covered topics such as how diversifying your team can build better leadership, discovering new markets for existing products, and biomanufacturing. One of the panels on the schedule was “Examining the Economic Impact of Wisconsin’s Biohealth Industry,” and Penny Patterson, our Vice President of Communications, was one of the panel participants. We spoke after the summit to learn what came out of the panel discussion and the topics of interest raised by the biohealth industry attendees.
As we talked, Penny explained many topics were discussed, but ultimately focused around how to attract talented individuals to the biohealth industry in Wisconsin. This concern stemmed in part from the lower profile of the biohealth industry in Wisconsin compared to the more prominent and well-known East and West coasts. Of note, education and quality of life are important tools for recruiting candidates to join the biohealth industry. Continue reading
Carl may not scare her…but did she remember the controls?
Warning: This blog contains stories about phantom serial killers, frankenfoods, mysteriously phosphorylated bands and unrequited ligations that may be disturbing to some people. Children or scientists prone to anxiety over irreproducible results should read this with their eyes shut.
Clouds hung low in the sky, and the late October wind howled between the buildings, rattling the window panes of the basement laboratory. The grackles cawed in desperate warning, their flocks changing the evening color palette from gray to black. I was as unsettled as the weather, watching my blot slosh back and forth. Continue reading
As a first-year grad student, I was so excited to start my thesis work. I brainstormed to make a list of experiments to try and then discussed them with one of the senior grad students in the lab. As I enthusiastically explained the goals of my experiments and what I was planning, he gave me a strange look. Puzzled, I asked for some feedback. He told me that, while these were good ideas, almost all of them had been published. Hence, my first lesson learned from grad school: immerse yourself in the field by reading relevant papers and then plan some innovative experiments to move forward. It’s critical to have a deep knowledge of your field of study—not just to be a good grad student, but to see what is being done and then build on it, or take a totally different approach to innovate.
Reading papers is a big part of keeping up with the latest research. And attending conferences can give you a sense of current work before it’s published. However, I’m sure that, at least once, you’ve heard a cool talk at a conference and then quite a while later, haven’t seen the corresponding paper (so that you can read about all the ins and outs of what they did!). Why would this be? They may have been discussing the data early on in their project. Or perhaps they submitted a manuscript and the review/publishing process is taking a long time. Maybe the data were so surprising that they felt they needed to do a lot of follow-up work to support their conclusions. Or maybe their PI takes forever to write/comment on manuscripts. Etc.
The sooner that you can find out what is going on in a field, the sooner you can design smart, relevant experiments. What can be done to get cutting edge work out there to facilitate the progression of a field as a whole?
Bottlenecks in communicating research can occur at 5 different points in the process. Here are some tips to try to alleviate these delays. Continue reading
Comic by Ed Himelblau.
In my second or third year as a graduate student, I had to ship some microfluidic masters to a collaborator in Kenya. The masters were extremely fragile and took me several days in a cleanroom gown to make. I was horrified at having to send them on a perilous journey overseas, and somewhat flabbergasted that they made it to Nairobi whole and well. And yet, every day thousands of delicate items zoom around the world and arrive at their destinations in one piece. How?
A couple months ago, I visited the lab where our packaging engineers (yes, that’s a thing) do their work. Here’s what I learned. Continue reading