Connect with us

People

Sleeping Astrocytes: Failures and Successes on the Journey to Publication

Laura Bojarskaite: “I want to be honest and tell you the story of how science actually happened for me and not how science should have happened according to all the rules, supposed-to’s, and textbooks.”

Published

on

Laura Bojarskaite

[su_boxbox title=”About”]Laura Bojarskaite is recent neuroscience graduate at Oslo University. She is a yogi, bookworm, astrocyte-lover, and a very passionate science communicator! Her recent first-author publication titled “Astrocytic Ca2+ signaling is reduced during sleep and is involved in the regulation of slow wave sleep” was published by Nature Communications on July 6, 2020. The narrative below explores the unwritten stories behind the publication. You can follow Laura on Twitter @laurabojaskait1 and find all her pop science articles, videos, and lectures on linktree @LauraNeuroTalks. The story below was edited by Katelyn Comeau.[/su_boxbox]

[su_boxnote note_color=”#c8c8c8″]Key Points:

  • What appears as sleep is not always sleep
  • What appears to soon to be finished is actually lightyears away
  • Be brave enough to explore the uncharted territories [/su_boxnote]

Laura Bojarskaite

Today I will tell you a story filled with hope and frustration, a little bit of patience and yet a lot of impatience,and cosily sleeping mice studied by a very tired scientist in the dark. My name is Laura and I am a neuroscientist-in-progress from the University of Oslo.

I want to be honest and tell you the story of how science actually happened for me and not how science should have happened according to all the rules, supposed-to’s, and textbooks. I want to talk about all of the details and nuances that nobody talks about (or at least doesn’t include in the paper), but that constitute 90% of time sciencing. I want to give randomness and simple curiosity credit because that’s a huge part of science – at least it was for me.

This was even how I found my passion for studying neuroscience, since what I started out studying before my PhD was actually quite different from what I do now. My Bachelor’s degree is in biochemistry and my Master’s degree is in pharmaceutical sciences. I was fascinated by the fundamental inner workings of our cells and all the tiny molecules inside, how they interact with one another, and how we can affect them from the outside. When I first started working in science, I was in a bionanotechnology lab trying to isolate various proteins and quantify their interactions on different surfaces to understand whether those materials were compatible with biology. I absolutely loved working at a university. By the end of my Master’s, I was sure I wanted a career in academia, but I was missing the spark of a topic that seriously motivated me to begin a PhD.

Call it luck, simple randomness, or holy intervention, but a book by Norman Doidge called “The Brain That Changes Itself” found its way into my hands and changed everything. In those pages, I learned about brain plasticity and its ability to change peoples’ lives. It soon became clear as day that neuroscience was where I would find my scientific inspiration. As my boyfriend was living in Oslo, the math was clear: neuroscience + Oslo = happiness.

I am very grateful for my background in basic science, which focuses on gaining a better understanding of a specific subject by focusing on the advancement of knowledge rather than solving a specific problem.

In other words, my early days in science allowed me to be driven by my curiosity about the unknown and explore the unexplored for the sake of exploration.

My journey towards understanding the role of astrocytes – the star-shaped glial cells of the brain – in sleep started exactly like that.

I began my PhD studies in the GliaLab research group at the University of Oslo, where we study astrocytes and what these beautiful “brain stars” (they are actually shaped like stars) do in the brain. The cool thing about astrocytes is that for a really long time they were thought of as mere passive supporters of the neurons, but only recently, new advances in technology have allowed us to discover that they do so much more than that. Needless to say, it has been very exciting to work on a cell type whose “true powers” are yet to be discovered.

One day, my supervisors and I were discussing all things astrocyte when we started brainstorming about what could I study for my PhD thesis. One topic that kept coming up was sleep. The science of sleep is a topic that seems to ignite the interest of the public and scientists alike.

At the time, the topic of sleep was again becoming “sexy” because a new piece of very exciting research had come out that suggested that sleep could literally “clean your brain”1. Waste products from our body are continuously removed with the help of lymphatic system. However, lymphatic vessels are not found in our brain. Instead, the brain utilizes a specialized system made up of astrocytes that hug around the blood vesselsin the brain to form a tunnel system. A special fluid runs in these tunnels and washes cellular waste out of the brain. Here’s the catch – this “brainwashing” system appears to only be on during sleep.

But why is this happening during sleep? Which cells in the brain drive this? Could it be astrocytes? How is it all regulated? These questions formed the foundations of my PhD project, which aimed to map uncharted territory and explore what astrocytes were up to at night. Thinking about these questions gave me chills of excitement, and they still do. Interestingly enough, we were not a sleep lab at that time. But I thought that it couldn’t be toohard to become one, right?

First, the mice needed to sleep. Since we need microscopes and special lasers to look at living astrocytes in the brain, the mouse needs to sleep under a microscope while being head-immobilized by a metal bar that is glued to their skull. Since we can’t see brain cells through skin or the bones of the skull, these mice have a piece of their skull replaced by glass so that we have an actual window into their brains. I guess you can also call me a mouse neurosurgeon!

And so began my 2 year long low-period of absolute failure trying to achieve just this.

For a while I tried to get the mice to sleep by placing them in plastic transparent tubes, hoping that inactivity or my lullabies would bore them to sleep. Unfortunately, both of these tactics seemed to only stress the mice out. After that followed a very long period of time where we tried to have the mice sit on an air-pressure driven floating styrofoam ball with the idea that their ability to move freely might reduce their stress and help them sleep.

The styrofoam ball quickly became my “curse-in-disguise”. At first, the mice seemed to be able to nap while sitting on the ball. I remember the first time one of my mice closed its eyes for more than a few seconds for the first time. The surge of excitement I felt is difficult to put in words. I had so much hope, and in that moment, I saw that I would make it through to my graduation.

Little did I know it would still take 4 years from that time for me to see my name printed on the Nature Communications journal website.

I soon discovered the problem was that after falling asleep, the mice would arouse instantly as their muscles relaxed, causing the ball to move very slightly and wake them up. “Hope is the mother of fools” they say, and this time the thought “but maybe next time the mouse won’t wake up?” cost me half a year of doing the same thing while hoping for a different result.

These were dark times of my life, both literally – as I spent months upon months of my life in a dark microscope room – and metaphorically. After some guidance from my mentor, I was encouraged to literally “drop the ball”, and finally I found my happiness in (and the mice found their sleep on) a horizontally spinning disc.

I remember witnessing my first slow wave sleep episode followed by rapid-eye-movement sleep. The big beautiful delta waves turning into marching strict theta activity in the EEG signal, a clearly visible release of mouse’s muscle tone, and the whiskers twitching in the dark. The amazing part was that we expected astrocytes to be completely silent during sleep, as they seemed to actively signal only during wakefulness and were silent during anesthesia, but that was not the case. What I saw was not an abolishment of activity, but a bunch of tiny beautiful flashes continuing throughout sleep (astrocytes, unlike neurons, are electrically non-excitable and instead of electrical signals, communicate through intracellular calcium ion signals that can be captured by molecules that turn green (or other colours) when binding calcium. Hence “flashes”).

I simultaneously felt feelings of awe, humbleness, and grandeur as I knew I was seeing something no one else in the world had yet seen. And yet, it was still just me in a dark microscopy room lit up by computer screen, clicking shutter sounds, and the little mouse in slumber, as things had been for months before this eureka moment.

In the following years I watched cosily sleeping mice for countless hours and also made some other interesting discoveries: 1) Sleeping mice are more sensitive towards the smells of coffee or a banana rather than you sneezing; 2) The voices of some colleagues seem to put the mice to sleep while mere presence of others wakes the mice up completely; 3) You can actually watch Netflix for 12 hours straight while waiting for mice to sleep; 4) If you hang a sign on the microscope room door saying “Sleeping mice. Please be silent and DON’T come in!”, people will definitely not be silent and will absolutely come in.

Our resulting paper on astrocytic calcium signaling during sleep only scratched the surface regarding astrocytic regulation of slow wave sleep and sleep spindle dynamics. But it also opened a Pandoras box of questions and future projects which drives us further and will do so for many years to come. It was a long and very bumpy (and sleepy) ride, but looking back, I am certain all my struggle was totally worth it.

I graduated on November 11th 2020, and now continue my sleeping astrocyte journey as a postdoc.

Reference:

  1. Xie L, Kang H, Xu Q, Chen MJ, Liao Y, Thiyagarajan M, O’Donnell J, Christensen DJ, Nicholson C, Iliff JJ, Takano T, Deane R, Nedergaard M. Sleep drives metabolite clearance from the adult brain. Science. 2013 Oct 18;342(6156):373-7. doi: 10.1126/science.1241224. PMID: 24136970; PMCID: PMC3880190.

Metrics

Sessions

[analytify-stats metrics=”ga:sessions” analytics_for=”current” custom_page_id = “”permission_view=””]

Total number of Sessions. A session is the period time a user is actively engaged with the page.

Visitors

[analytify-stats metrics=”ga:visitors” analytics_for=”current” custom_page_id = “”permission_view=””]

Users that have had at least one session within the selected date range. Includes both new and returning users.

Page views

[analytify-stats metrics=”ga:pageviews” analytics_for=”current” custom_page_id = “”permission_view=””]

Pageviews is the total number of time the article was viewed. Repeated views are counted.

CivicSciTV

Spanish Edition: Science Communicator, Alessandro Strobbe, teaches scientific topics with humor

Published

on

Alessandro Strobbe is a Peruvian science communicator with experience in public engagement through storytelling and creative writing. He also conducts research in science communication, critical thinking, and citizen science. He is most known as Doctor Trónico on social media, with his science popularization project for teaching science and skepticism with humor, using memes in social media. It has a range of 1-3 million prints per month, +500 creative writing columns, and +1000 graphic arts. His talk show Ciencia Picante, also uses language accessible to all audiences and creates an informal environment focused on the popularization of scientific studies and science engagement.

Continue Reading

People

A Development enhancing tale with a microbial rich cocktail

Published

on

Minisha Pereira

Dr. Minisha Pereira, Ph.D., is a Research scholar from Indian Council of Medical Research -National institute of Malaria Research, Field unit Goa, India. Her main area of Research is Vector biology which includes aspects of microbiology and molecular biology. Her recent publication titled “Characterization of midgut microbiome of Anopheles stephensi Liston” was published on March 2021 in Journal of vector borne diseases. The narrative below explores the story behind the unseen facts from her published work. She wants to bring the concept of her research in way which will be appreciated and also bring awareness to sustain public health. You can follow Dr. Pereira on Twitter @HMinisha.

Key Point

Spreading awareness among each other doesn’t need a lot support. But it necessitates a kind heart, a strong mind, and a never-fading goal. Let us identify the ways to save ourselves from vector-borne diseases and pests to live in harmony with nature and preserve the majority of useful insects. In these times of pandemic as we are living in anxiety and fear, Let us unite ourselves as beings and stop the spread of COVID far and near.[/su_boxnote]

With thoughts of COVID gushing in my mind, I was sitting down the lane next to my research lab during one evening time. Just then, I heard the conversations that got me stunned and startled. A conversation between two mosquitoes, sharing their knowledge and their thoughts. Curiosity and excitement gushed within me, leading to an elevated enthusiasm enforcing me to listen to their entire conversation.

The story was between two mosquito friends Anopheles stephensi and Anopheles subpictus who shared their thoughts about their current life status. So, without any delay, let us start the conversation replay…

An. subpictus: Hello!! My dear friend do you know we are at the brink of losing our significance because of COVID-19 outbreak globally??

An. stephensi: Do you feel so? My friends in scourges are already spreading Malaria. Luckily, the whole world around is so busy with the pandemic that they lost their focus on us.An. subpictus: Ohh great! But can we be as deadly as the virus?

An. stephensi: Deadly?? Stop misjudging yourself. We can be very fatal to all mankind, even though that’s not our intention. Our mission in life is to feast on their blood but,  that cunning parasite (Plasmodium) that comes along during our bloody diet can cause sickly malaria. With chills and shakes, we can make an all-powerful man go crazy and also cold-hot-sweaty.

“A few decades ago, actually around 1987, our ancestors set their sight on the lovely state of Goa, just like tourists. We made such a Merry in Goa, dancing and feasting so much on the blood that hundreds of people were put down with malaria and some did not raise again. Yes! They were dead and gone. But then they took revenge on us and something horrible happened to us. These creatures, the humans, do not give up easily as they say.

An. subpictus: What did they do?

An. stephensi: They set up a big institute named ICMR-NIMR (Indian Council of Medical Research-National Institute of Malaria Research) to pack us off from Goa. The team NIMR chased us so much that we were so scared. Clever that they were, firstly they started learning everything about us, our lifestyles, our activities and behaviour. With their knowledge and expertise, they managed to attack our homes (breeding sites: artificial containers, wells, freshwater pools, stream margins, water storage containers, construction sites) affecting all our kids (immatures: larvae & pupae) thereby leaving us homeless using all different kinds of ways. If they had used DDT powder, nothing much would have happened to us as we can deal with it.

But they were destroying our homes, clearing the water, using bacterial powder where our kids thrive. And that was not enough, they started to release fish that would pick up our kids (larvae and pupae) and eat them in hundreds. (Mosquito cries).

An. subpictus: But then how did you manage to continue to survive?

An. stephensi: You see we may be small but we are powerful. Nature has created us much before man, who tends to relax and celebrate his successes. But we mosquitoes are serious about our living and keep doing our jobs even at night and produce batches of eggs every 48 hours and thus manage to survive being so potent and productive.

Hey! There is some big Office WHO in Switzerland where they discuss us. Can you imagine our power? They were saying our entire sister species put together; we globally kill more than 400 000 humans every year. We don’t spare pregnant ladies and young children. They are our first targets. But again, that clever man has an answer. They have started using insecticide-treated mosquito nets (ITNs) and preventive antimalarial medicines which are so effective that we are losing our sting power.

An. subpictus: Oh yea!! Then this Goa team trained their guns on me recently and started blaming me for spreading malaria parasites from sick to the healthy alongside you, stephensi. They have found this out using a special machine called PCR.

An. stephensi: Yes these ICMR guys have turned out to be a big threat to all of us the last few years. I even heard that a Ph.D. student Minisha (author) is also working on various kinds of bacteria in our tummy (midgut microbial diversity) which she is planning to use against malaria-causing parasite Plasmodium.

She has killed hundreds of us to study our bacteria. One of our friends who escaped her slaughter voiced out. This Minisha first gives them a special clean-up! She calls it surface sterilization of our babies and us and then cuts us open, reaches our stomach and crushes it, and puts it on some medium to multiply these bugs in our stomach and study them.

An. subpictus: Oh My God!! May their soul RIP!! What she must have done after that?

An. stephensi: I heard that she has recognized (identified) many of them and she is calling them by names. Using so many chemicals and complex methods she has identified bugs that are already dead in our stomach and fail to grow. I heard her calling this method as molecular technique Metagenomics. I have never heard of these difficult words. But, she says, her work can be very helpful for us too.

An. subpictus: How is that possible? On one side she is doing this to harm us and on the other, she is spreading this news? What is the basis? You don’t believe her blindly.

An. stephensi: She identified microbes from our friend’s midgut and matched them with those residing in the curing water habitat where our babies live and also matched them up with us who are jailed in her laboratory. I even heard her saying that some of these bugs (microbes) help us grow from babies (larvae and Pupae) to adults.

She claims that our friend’s breeding and their larvae feeding in the laboratory in tap water have different bacteria in their stomach than the one she identified from curing waters. Since field water is healthier and has more variety of these bacteria, I have started to lay my eggs in the field sites so that I have stronger offspring with greater immunity. Is not she crazy???

An. subpictus: Oh really? That’s cool!! I think even I should tell my friends to do the same.

An. stephensi: No doubt’s she is a crazy girl. She did not stop here. She even treated hundreds of our friends with an antibiotic (Tetracycline hydrochloride) and compared their life events with our friends from the field and Laboratory population. By doing this she studied the influence of the microbe on our life cycle. Our sisters who received this special treatment laid a fewer number eggs compared to others who did not. That means these tummy bacteria are important for us.

An. subpictus: But my friend, I am warning you because she may be doing something else to control us. It is possible that she may be doing this for the same purpose.

An. stephensi: whatever she does she will do to put us down. I heard she has got some bacteria common in water, our babies, and us.

She got different kinds of bacteria common in all the stages viz. water, larvae, pupae, male and female by a metagenomic approach. She also confirmed the presence of Pseudomonas along with few more microorganisms. She says she will try to manipulate them against us for vector control.

An. subpictus: oh no!! I think her research is going to be a big threat to all of us in Goa.

An. stephensi: yes indeed! This crazy budding Scientist is dangerous.

An. subpictus: what you think we should do now

An. stephensi: First let us go and show her our power. We both will go and bite her.

An. subpictus: No! We should avoid her. She may catch us and open our stomachs also.

An. subpictus: Then let us be smart and use her study in boosting our immunity just like humans, who are enhancing theirs against COVID-19 now days.

An. stephensi: How do we do that?

An. subpictus: Let us breed and drink water from curing water site, the water-rich in the microbiome. Her research showed an increase of Bacillus sp. in tap water while more diversity of microbiome in the curing water habitat. This will boost our immunity making us stronger and healthier.

An. stephensi: subpictus my friend, we had a very informative dialogue. I will surely inform all my friends and also see that they take the precautions.

An. subpictus: Yes indeed, in fact, I asked my friend to stay safe because I heard she is searching for some more mosquitoes for her further research. In short, humans are running away from the Coronavirus and we should from this mosquito girl. People do not understand that we don’t harm humans intentionally. Since we need blood for the sake of our eggs and the future. If that was not the need and requirement we wouldn’t have bitten them, unlike males who only feed on nectar for their survival.

An. stephensi: it’s the law of nature and no one can change that, ultimately, it’s the fight for survival and the fit shall survive.

An. subpictus: yes, so true I just hope now the pandemic subsides so that we regain our importance very soon.

An. stephensi: Don’t worry my friend, this autumn will be a new start for us and for all mankind let us hope for the same.

Ending the conversation, both the mosquitoes bid goodbye to each other and went away. As they dispersed, I was left pondering so many questions.

Read more on the Journal of Stories in Science

Continue Reading

People

Growing up in Science: Anne Urai

Published

on

Anne Urai 

[su_boxbox title=”About”]Dr. Anne Urai received her undergraduate degree in cognitive neuroscience and philosophy at University College Utrecht in 2010, followed by a masters in brain and mind sciences at University College London and Ecole Normale Superieure in Paris. She then pursued her doctoral research with Tobias Donner at the Universitätsklinikum Hamburg-Eppendorf and University of Amsterdam, investigating how our previous choices bias the way we interpret later information, and how this process is affected by the confidence in our decisions. Her PhD was awarded the NVP brain and cognition thesis prize, specifically for its combination of interdisciplinary methodology and open science approaches. As a postdoctoral fellow in Anne Churchland’s lab at Cold Spring Harbor in New York, she studied the neurophysiology of decision-making using high-density neural recordings in the mouse brain. During this time she was a core member of the International Brain Laboratory, working with a global team of systems and computational neuroscientists to assess the reproducibility of systems neuroscience. She joined Leiden University in The Netherlands as an Assistant Professor in 2020, and was awarded tenure in 2022. Dr. Anne Urai’s research focuses on the neural basis of decision-making across mammalian species, and the interaction between learning and perception. A current focus of her work, funded by an NWO Veni grant, is on changes in neural and behavioral noise across the lifespan. The story below is co-published with Growing up in Science. [/su_boxbox]

[dropcap]I[/dropcap]had a careless childhood. I was good at school, but could never quite decide on my passions. I dropped high-school physics and chemistry in a streak of rebelliousness, only to realize my mistake a year later and catch up over the summer break. In my first semester at university, I randomly signed up for several interesting-sounded courses and got into cognitive neuroscience and philosophy.

I loved both of them, deciding on the spot that I would solve all of psychology by studying the brain. I spent my exchange semester traveling and eating my way through China, and another year working soul-crushing sales jobs, herding sheep in France and ultimately following my boyfriend to backpack through Asia. In a hot Moroccan internet cafe, I read that someone would pay my to live and study in London and Paris for two years, which seemed too good to true!

During my masters, I pursued my fascination for consciousness research (usually reserved for retiring professors) which mostly involved staring at EEG wiggles in windowless rooms. As a friendly collaborator was fixing my atrocious Matlab code, he off-handedly mentioned that Tobias Donner had just started a lab in Amsterdam – conveniently close to the city where said boyfriend had just started a new job. With my heart racing I approached Tobias at a meeting, didn’t faint, applied for a fellowship, and started my PhD in his group.

Having made most of my MSc thesis figures in Excel, I suffered serious imposter syndrome, but discovered I actually quite liked the technical and programming parts of the job. I passed through a serious crisis halfway through the PhD: my initial proposal turned out to be severely underpowered, psychology’s replication crisis was in full swing, my advisor’s lab had moved to another country, and I hadn’t published a single paper.

My advisor’s gentle persistence, many yoga classes and an adopted cat helped me follow through, and I decided to give postdoc life a chance. After getting stuck in a snowstorm when interviewing at CSHL, I accepted the offer to join the Churchland lab, got married, and defended my PhD within a frantic 6-months!

Coming from a background in psychology and cognitive neuroscience, it was both frightening and exhilarating to work with ‘real’ neuroscientists. I had to learn soldering, surgery and bluffing my way through genetics. I loved being a part of the (then early-stage) International Brain Lab, but started feeling terribly homesick after 1.5 years on Long Island.

Just as I prepared to spend the summer doing data analysis in NYC, Covid-19 hit. Bored at home in lockdown, I opened a long-forgotten ‘Jobs’ email folder and saw a vacancy for a combined psychology teaching and research position in The Netherlands. Within short succession, I found out I was pregnant, got the job, and learned the Churchland lab would be moving to California! Choosing my rainy, flat home country over sunshine, I hurried to finish experiments and returned home just in time for maternity leave.

So far, I have survived my first year of sleep-deprived parenthood and my assistant professorship, which has turned into a tenured position by happenstance (i.e. union negotiations). While getting settled into faculty life, I regularly experience existential dread and wonders if writing scientific papers is what I should be doing for the next 35 years. Since my postdoc in the US, I am increasingly concerned about the climate crisis, and I spend my evenings thinking about decarbonizing academia and worrying about the future.

Metrics

Sessions

[analytify-stats metrics=”ga:sessions” analytics_for=”current” custom_page_id = “”permission_view=””]

Total number of Sessions. A session is the period time a user is actively engaged with the page.

Visitors

[analytify-stats metrics=”ga:visitors” analytics_for=”current” custom_page_id = “”permission_view=””]

Users that have had at least one session within the selected date range. Includes both new and returning users.

Page views

[analytify-stats metrics=”ga:pageviews” analytics_for=”current” custom_page_id = “”permission_view=””]

Pageviews is the total number of time the article was viewed. Repeated views are counted.

Continue Reading

Popular