Meeting with Mariia Nazarova: Understanding chromatin regulation key factors
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Author: Marcio Marim
In this new user story, meet Maria Nazarova, a PhD student at IGBMC in Strasbourg. For her research on chromatin regulation mechanisms, she benefited from the FBI Access Fund to access cutting-edge technology available at the MRI-CRBM platform in Montpellier. But as is often the case in science, not everything went according to plan.
Read her story to find out more!
To start, could you tell us a bit about yourself? What has been your academic journey so far, and what is your current role or area of work?
I have always been interested in molecular biology, and I’ve been lucky to explore it from several angles starting with plant genetics, moving through cancer-related non-coding RNAs and immunoglobulin locus rearrangements, and finally arriving at my current favorite topic:
Chromatin dynamics and its role in crucial processes like transcription, replication, and repair
I’m now a 3rd-year PhD student in the Tom Sexton Lab at the IGBMC in Strasbourg, where I study how enhancers communicate with promoters using live-cell imaging.
What are you currently working on in your research? What is the main topic or challenge you’re exploring?
Even though enhancers are key chromatin regulatory elements in both normal cell function and disease, we still know surprisingly little about how they find, choose, and activate their target genes.
It seems these mechanisms aren’t universal, but instead depend on many variables such as gene type and function, genomic distance, nearby regulatory regions, and the local epigenetic environment.
Mouse ESC with Sox2 promoter labelled (red) and Sox2 real-time expression (MS2/MCP).
My goal is to uncover some of those specific rules by modulating these factors in mouse stem cells and tracking how enhancer and promoter dynamics change during transcription under different conditions.
At what point did you come across France-BioImaging, and what made you want to use its services or connect with the infrastructure?
One of the main limitations of live-cell imaging is phototoxicity, which is especially important in my project because the cell line I use has three endogenous labels. Light Sheet technology seemed like the ideal solution for this.
To follow the dynamics of enhancer and promoter over long periods and across multiple transcriptional cycles without harming the cells, I need a system that can provide strong signal at low laser intensity.
Mounia Lagha, our collaborator from the Montpellier campus, shared the opportunity to apply for the France-BioImaging program, which I did and was fortunate to be selected.
Could you walk us through your experience accessing France-BioImaging? Which facility did you work with, how did the process go, and what stood out to you during your time there?
I spent two weeks at the Montpellier Ressources Imagerie(MRI) facility(MRI-CRBM, ed.), working with the Lattice Light Sheet microscope.
During the first week, I focused on learning the system — first with fixed samples provided by the team, and then moving to my own cells. Since my chromatin labels appear as single bright-ish spots on a background signal, it took some time to adjust, especially because I’m used to spinning disk microscopy.
The light sheet setup offers a very different perspective — both literally in terms of imaging geometry and in terms of how the data looks and behaves.
The second week was fully dedicated to data generation, though it came with some technical challenges.
The main issue was time resolution. Because I was working with three fluorophores, and the system had only one camera and needed to sequentially switch lasers, I could only get around 6 seconds per frame compared with the 1-1.5 seconds I’m used to with spinning disk.
That’s a big difference when you’re trying to follow the subtle, local dynamics of enhancer-promoter interactions in real time. So unfortunately, I wasn’t able to collect data I could use for quantitative analysis.
However, the experience itself was extremely valuable, and I’m very grateful for the opportunity. The MRI team was welcoming and supportive throughout my stay.
I am especially thankful to Virginie Georget, who guided me through the imaging process and was deeply committed to helping me get the most out of the system. Her knowledge, patience, and willingness to adapt the setup to my experiment made a big difference.
Even though the data didn’t turn out as hoped, I came back with a much deeper understanding of microscopy techniques in general and a lot of ideas for how to better design future imaging experiments.
What did microscopy bring to your project specifically? Were there insights or results you couldn’t have obtained otherwise?
Microscopy, especially live-cell imaging, is absolutely essential for my project. It allows me to directly follow the spatial and temporal behavior of enhancer-promoter pairs inside the nucleus, in real time.
Even though the data from the Lattice Light Sheet setup couldn’t be used in the end, it pushed me to think more deeply about the technical needs of my project, and it gave me first-hand experience with a powerful imaging technology that could still be extremely useful under different experimental conditions.
Looking back, would you encourage other researchers to use France-BioImaging’s platforms and access program? What would you say to someone considering it?
Yes, absolutely. The experience is not only useful for data generation, but also incredibly enriching from a learning and technical development perspective. It gives you access to cutting-edge technologies and expertise that you might not have in your home institution.
My advice would be to plan ahead as much as possible, communicate clearly with the hosting team about your needs and expectations, and if your project involves live imaging, try to negotiate at least three weeks, especially if you’re planning to use a new system. Two weeks pass very quickly, and having more time makes a huge difference.
We are delighted to introduce Carolina Eliscovich, one of the awardees of the “FBI Call for User Access Projects 2024.” Carolina was granted access to one of the France-BioImaging facilities to advance her research using cutting-edge imaging technologies.
In this interview, she shares insights into her scientific journey and her current project, which explores how mRNAs are spatially organized and regulated in the liver of a living organism using advanced RNA imaging techniques.
To start, could you tell us a bit about yourself? What has been your academic journey so far, and what is your current role or area of work?
I am originally from Buenos Aires, a cosmopolitan and multicultural city in Argentina; and it is in this city located in the southern region of planet Earth where my academic journey starts inspired by the legacy of multiple local Nobel Laureates in Biomedical Sciences surrounded by yerba mate drinking and fútbol. Encouraged by my high school teachers to follow my curiosity to understand how living things function, I studied and graduated in molecular biology at the Faculty of Exact and Natural Sciences of the University of Buenos Aires.
Shortly after that, I moved to Europe to continue my scientific formation and completed a PhD in Biological Sciences at thePompeu Fabra Universityand Centre for Genomic Regulation in the vibrant city of Barcelona, Spain. My PhD thesis work, under the mentorship of Dr. Raúl Méndez, focused on the study of how maternal mRNAs encoding for proteins required for spindle formation and chromosome segregation are locally translated by the RNA-binding protein that promotes cytoplasmic polyadenylation to ensure proper meiosis progression in Xenopus oocytes.
I subsequently crossed the Atlantic Ocean back again but this time I headed to the North, to the greatest New York City in the USA, where I joined, as a postdoctoral fellow, the laboratory of Dr. Robert H. Singer at Albert Einstein College of Medicine. During my training in his lab, I acquired unique professional expertise in RNA biology by using single-cell and single-molecule fluorescence microscopy technology. We developed a robust methodology, named super registration, using single-molecule fluorescence in situ hybridization in combination with immunofluorescence (smFISH-IF) to determine the physical interaction between individual mRNA molecules and their binding protein(s) within single neuronal cells using standard wide-field microscopy. As a result of a successful collaboration with other colleagues in the lab, we also developed a novel imaging technology to visualize and quantitate the mechanism of translation of single transcripts in real time in living cells.
I have always been interested in the cell biology of mRNAs since my first days at the lab bench; and now my lab also at Einstein expands on the study of these versatile macromolecules by watching them within cells in tissues. Most of the knowledge we have about RNA regulation comes from studies in cells in culture, but little is known about how RNAs behave in the native context of the tissue under physiologic conditions, and this is the knowledge we would love to contribute to the field.
What are you currently working on in your research? What is the main topic or challenge you’re exploring?
I recently became interested in the biology of the (mouse) liver; and my current research program at Einstein focuses on the development of RNA imaging technology using fluorescent-labeled probes to visualize the spatial organization of mRNAs in the healthy and regenerating liver. The architecture of the liver is unique and what I find fascinating the most is that gene expression of the hepatocytes-the dominant cell type in this organ- are spatially regulated depending on their distance to the vasculature.
This organ is also remarkably resilient and capable of regenerating itself upon a variety of injuries or surgical removal of a significant portion of the organ mass. This process has biological and clinical relevance because it is the foundation of liver transplants and, unfortunately, organ transplantation is the only treatment for liver failure. What we found is that during this incredible regeneration response, hepatic gene expression is dynamically reprogramed, and therefore, it is an ideal model system to study mechanisms of mRNA regulation in time and space in a living organism.
A current ongoing challenge we face in our studies is to examine individual cells not only at tissue-scale but also with single molecule sensitivity while preserving tissue morphology. Also, and importantly, high-throughput and multiplexing has been always challenging in imaging-based technologies due to a limited number of different fluorophores that can be simultaneously detected because of spectrally overlapping wavelengths. Luckily, we were able to overcome these difficulties thanks to the France-BioImaging available technology!
At what point did you come across France-BioImaging, and what made you want to use its services or connect with the infrastructure?
The France-Bioimaging infrastructure came along in my research thanks to Dr. Edouard Bertrand (Institute of Human Genetics, Montpellier, France). I had the privilege of working with Edouard at Einstein while he was doing a sabbatical year in the Singer lab a few years ago. Later, he introduced me to the mission of the infrastructure and how the state-of-the-art imaging technologies and resources were bringing to all investigators across France that could not access the equipment otherwise.
I remember that I felt a bit jealous of the platform; my lab was located overseas, how would I get access to the France-BioImaging facilities that I needed?
And the answer came last year when France-BioImaging launched for the first time the call for external users (both national and international). It was a great opportunity to finally gain access to the platform and get training on the technology that was missing in our studies: to visualize, simultaneously, multiple individual mRNA molecule species in the intact mouse liver tissue during regeneration. And I submitted my application.
Could you walk us through your experience accessing France-BioImaging? Which facility did you work with, how did the process go, and what stood out to you during your time there?
The experience at the France-BioImaging facility was incredible!
My application included access to sequential FISH methodology developed by Dr. Davide Normanno, postdoc in the Bertrand lab, thus, I visited the Bertrand laboratory and theMontpellier Resource Imaging (MRI) facility in the Institute of Human Genetics in Montpellier for two weeks. Before my arrival to Montpellier, we worked virtually on the design of the fluorescent probes, protocols and details on sequential FISH methodology and equipment. Everything was planned before my arrival.
But life is certainly filled with unexpected events and on my very first days in Montpellier, Davide went suddenly on a medical emergency that required surgery and was not able to be in the lab the subsequent days*; and it was thanks to the collegiality and generosity of the investigators at the France-Bioimaging infrastructure that I was lucky to meet and count on Drs. Marcelo Nollmann and Jean-Bernard Fiche at the Center for Structural Biochemistry, just across the street, who rapidly jumped in and helped to finish the training on the sophisticated automated microscope with a microfluidic perfusion system to perform sequential FISH. We were running against the clock and against all odds our sequential FISH pilot experiment on liver tissue worked beautifully and we were able to visualize, for the first time, multiple mRNAs within hepatocytes in the intact liver tissue during regeneration, something we could not have done without accessing France-BioImaging. Thanks to all!**
I will never forget how I felt while looking at the first images we took; it was one of those unique moments in the lab where we are fortunate to see the unseen.
*Davide recovered well, and he is currently healthy and working in the lab.
**I am deeply thankful to Edouard, Davide, all the people in the Bertrand lab, Marcelo and Jean-Bernard for their kindness and generosity during my visit. I could not have done anything without them!
Panoramic view of a hepatic lobule showing DAPI-stained nuclei (white). The central vein (CV) and the Portal vein (PV) are indicated. Region of interests (ROI, indicated in colors) were imaged sequentially and then stitched to reconstruct the liver tissue morphology. Scale bar, 50 μm.
What did microscopy bring to your project specifically? Were there insights or results you couldn’t have obtained otherwise?
My lab is, in essence, an RNA imaging lab. Single-cell and single-molecule microscopy allow us to use the power of quiet observation and understand what every single cell is doing in its preserved microenvironment within the tissue, giving us insight about the heterogeneity present in a biological sample that is usually masked in other methodologies.
Even though we perform standard smFISH (up to 2-3 different RNA species) in liver tissue in our lab in a routinely manner, we could not have been able to advance the method to image multiple RNA species (multiplexing; up to 16 different RNA species) and in a high-throughput way (by the use of an automated microfluidic system) without accessing to the France-BioImaging facility at the MRI-IGH in Montpellier.
Sequential smFISH imaging technology applied to liver tissue allows us to study the simultaneous expression of multiple mRNAs within the same hepatocyte giving us unprecedented gene expression information of a regenerative liver cell in vivo.
The analysis of these images will give us understanding about mechanisms that the liver may employ to segregate different functions along the hepatic lobule and shed a light on the co-expression of genes that have been always thought not to be expressed at the same time in the same cell. This will allow us to explore in depth the relationship between tissue morphology and the molecular state of the cells and, therefore, cell function in vivo.
Magnification of the white box area inside ROI_3 in panel (A). Only six different mRNAs are shown in different colors to illustrate the method. DAPI-stained nuclei (blue). Single RNA molecules and sites of transcription can be visualized in the cytoplasm and nucleus of the cells, respectively. Merge image is also shown. Scale bar, 10 μm.
Looking back, would you encourage other researchers to use France-BioImaging’s platforms and access program? What would you say to someone considering it?
I would encourage everyone in the scientific community from students and postdocs to principal investigators to look for opportunities to access the France-BioImaging facilities. The first thing I would say to someone considering this is that they will never regret the experience because it is a great chance to learn and test the feasibility of a new imaging technology and/or methods applied directly to their specific research question, something that could take a lot of time (and funds) if they do not have the technology already established in their home institutions.
The France-BioImaging facility nodes include a great variety of state-of-the-art microscopes and imaging technologies available that I am sure each researcher can find the proper match for their scientific needs.
Finally, this access program would eventually help them to establish collaborations with the experts in the host lab/institution and even lead to the opportunity to reimplement the technology in their home labs or institutions where it would serve as the foundation for future directions of research in the upcoming years.
If I had the opportunity to apply to the France-BioImaging call for user access program again, I would do it without a doubt!
A research team from the Laboratoire de Biogenèse Membranaire (CNRS/University of Bordeaux), in collaboration with the Bordeaux Imaging Center, has recently developed ROOT-ExM, a novel protocol enabling the application of expansion microscopy to plant tissues, specifically the primary root of Arabidopsis thaliana. This method overcomes key limitations that had so far prevented the use of expansion microscopy in plant systems.
Zoom in on expansion microscopy
Expansion microscopy (ExM) is a super-resolution imaging technique that relies on the physical enlargement of biological specimens embedded in a swellable hydrogel. By expanding the gel, the distance between fluorescent labels increases, thereby enabling nanoscale resolution with conventional microscopes.
Plant cells are embedded in a dense network of polymers (cell walls) that provide mechanical strength and prevent expansion. These structural barriers are especially problematic for expansion microscopy, as they hinder both the penetration of labeling molecules and the isotropic expansion of the sample.
ROOT-ExM: Tailoring expansion microscopy for plants
To adapt ExM to plant roots, the team developed a two-step strategy combining:
A mild cell wall digestion, sufficient to relax the cell wall structure and facilitate labeling,
And a plant-optimized ExM protocol, compatible with common fluorescent markers and preserving tissue architecture during expansion.
Promising results
ROOT-ExM achieves an approximately 4-fold linear expansion of Arabidopsis roots with minimal deformation.
B) Confocal microscopy images of the same root with the same field of view before expansion and after ROOT-ExM. – In yellow: Endoplasmic Reticulum – In blue: Cell wall C) Expansion factor quantification. The diameter of nuclei was measured before and after expansion.
When combined with confocal microscopy, this technique enables nanoscale visualization of intracellular (nuclei, Golgi apparatus) and intercellular (plasmodesmata, microtubules) structures with resolution comparable to advanced super-resolution methods.
Representative images of acquisitions in confocal on nonexpanded samples (left), super-resolution lifetime-STED on nonexpanded samples (middle) and confocal after ROOT-ExM (right).Labelling of Golgi apparatus.
In addition, coupling ROOT-ExM with lattice light-sheet microscopy (LLSM) allows 3D reconstructions of cellular processes at nanometric resolution and across large tissue volumes.
Volume acquisition of a root cell labeled with anti-KNOLLE (membrane marker during cell division) after ROOT-ExM and imaged by LLSM.
Looking ahead
ROOT-ExM demonstrates that super-resolution imaging of plant tissues is possible using conventional microscopes and accessible labels. While currently limited to the primary root of Arabidopsis thaliana, this protocol lays the groundwork for expanding ExM to more complex plant organs and other species. Rather than replacing high-end super-resolution techniques, ROOT-ExM stands as a complementary approach, providing an accessible, scalable alternative for plant imaging at the nanoscale.
The RIC (Réseau d’Imagerie Cellulaire Paris-Saclay) is pleased to invite you to a conference on Super-Resolution Microcopy on October 3rd. The aim is to raise awareness of super-resolution microscopies and their practical applications in the study of fundamental biological mechanisms.
The France-BioImaging Image Contest is back for its 6th edition!
This image contest is open to all within the imaging community: core facility staff and users, R&D labs teams and co-workers, students… Submit your best microscopy images for a chance to showcase your skills, research and creativity to the French bioimaging community and beyond, allowing people to see the visual appeal of the life sciences. Images from the contest will be featured on France-BioImaging communication tools, online and in print.
France-BioImaging and all the French community aims to develop and promote innovative imaging technologies and methods. But microscopy images can also take an artistic, creative look and make the invisible world beautiful.
We are all eager to see your work !
Prizes
1 to 3 images will be awarded depending on the quantity and quality of the entries submitted. France-BioImaging will cover the registration fees for one 2024 microscopy related event of the winners’ choice (FOM, ELMI, EMC, COMULIS conference, etc.).
Important: Only French or foreign participants affiliated to a French institution can enter the contest. Foreign participants non-affiliated to a French institution can submit images and will be featured in the gallery, but will not be evaluated as part of the contest.
Submission deadline: Friday, November 8th, 2024, 23h59 UTC+2.
Following the final decision of France-BioImaging Institutional Committee on February 27th, 2024, we are delighted to announce that two new nodes are joining France-BioImaging: the Normandie Node and the Rhône-Alpes Node.
The new Normandie Node is composed of one imaging facilities: PRIMACEN. The node has also six highly visible R&D teams (from COBRA, IRIB, Cyceron, GlycoMEV and SCALE) expert in microscopy techniques and tools.
Mainly located in Rouen and distributed to Caen and Le Havre, the Normandie node is offering high level technical and innovative methodological expertise in multi-scale imaging at the interface between biology, chemistry, optics and physics, from the atom to the small animal/plant.
The Normandie Node has expertise in vascular sciences, microalgal biosciences and intercellular communication. Moreover, they are in a strong collaboration with the International master program in cell imaging where students are intensively trained on PRIMACEN equipment and have the opportunity to go abroad thanks to a cooperation with Finland.
The node provides cutting-edge technologies and methodologies, with among others:
STED, FLIM and combination of STED-FLIM for fixed and living cells to study in particular cell-to-cell connections such as Tunneling NanoTubes (TNTs) in PC12, HBEC, H28, MCF-7 cells.
Complementary heart advanced light imaging including confocal micro- and macroscopy, light-sheet microscopy and image analysis to study microvascular and lymphatic dysfunction.
New multimodal probes to study vascular brain diseases: reporter fusion proteins to track tPA, biodegradable and ultrasensitive microprobes, contrast agent that is targeted to adhesion molecules such as p-selectin, V-CAM1 (Vascular cell adhesion protein 1) and mucosal vascular addressin cell adhesion molecule 1 (MAdCAM-1).
Advanced light microscopy and TEM imaging to study microalgae as a cell factory including morphotypes characterization, subcellular localization of molecular actors involved in the N-glycosylation pathway (GDP-Fucose transporter, Fucosyltransferase and GnT I located in the Golgi apparatus).
New organic fluorophores and new chemobiology tools: 3-Benzoylquinoxalinone, Fluorophore-assisted click chemistry through copper(I) complexation, Epicocconone-hemicyanine hybrids and Indazole merocyanines.
The new Rhône-Alpes node is composed of two core facilities: LyMIC in Lyon and ISDV in Grenoble. Gathered into one entity, LyMIC consists of three core facilities providing advanced photonic, atomic force and advanced electron microscopies. ISDV comprises five photonic microscopy facilities and three electron microscopy experts. Moreover, six R&D teams complete the node and supports the facility (from ILM, LiPHY, IAB, ENS-Lyon and GIN).
The Rhône-Alpes node aims to maintain the level of scientific excellence in response to the needs of users and the concerns of host laboratories. Four scientific axes are conducted: imaging, quantifying and controlling cell metabolism; biomechanics from molecules to tissues; spatial transcriptomic; and 3D multiscale imaging.
The node provides cutting-edge technologies and methodologies, with among others:
The project Confobright (Adaptive Optics for Quantitative Confocal Microscopy-AOQCM) has been designed to correct for optical aberrations, making deeper, better resolved and more sensitive confocal and multiphoton imaging in optically heterogeneous tissues.
The project Quantifret is a new calibration and analysis method allowing for quantitative FRET imaging in living cells with a simple fluorescence microscope, giving absolute FRET values, independent of the instrument or the expression level, and usable confidently by non-specialists.
Eternity buffer, launched as Everspark by Idylle in 2021 is distributed worldwide (20 countries) to more than 100 researchers (80% abroad including 20% in the States). It represents a major breakthrough in the field due to its long lasting life (several weeks against 2 hours for classical GLOX).
FluoRef calibration beads, renamed SpheroRuler by Idylle, is under ß-testing program until the end of January. These 1 µm beads are coated with a fluorophore emitting in the far red channel suitable to blink in dSTORM buffer for calibration imaging on 2D and 3D super-resolution microscopes.
An integrated service of methods to measure forces and elastic properties in plants and insect models (through coupling of AFM and confocal imaging).
The pipe-line for analysis of deep 3D EM data (FIB-SEM +/- Cryofixation) with the easily accessible integration of multiple aspects of segmentation, training of dedicated IA network and export of characteristic quantitative parameters.
Welcome to the FBI Normandie Node and the FBI Rhône-Alpes Node!
The next Euro-BioImaging User Forum will take place online on Thursday, October 12, 2023, from2 pm-5 pm CEST. The topic is “Understanding plant biology.” This event will highlight how cutting-edge imaging technologies can support research into the structure and function of plants, shed light on plant health, resilience and adaptability, and help answer agroecology research questions. Applications of diverse imaging technologies and plant biology research contexts will be highlighted by two keynote speakers and presentations from users of the Euro-BioImaging services, showcasing the specific expertise available at the Euro-BioImaging Nodes. We will also provide information on funding opportunities to access Euro-BioImaging services for agroecology-related research projects.
The France-BioImaging Image Contest is back for its 5th edition!
This image contest is open to all within the imaging community: core facility staff and users, R&D labs teams and co-workers, students… Submit your best microscopy images for a chance to showcase your skills, research and creativity to the French bioimaging community and beyond, allowing people to see the visual appeal of the life sciences. Images from the contest will be featured on France-BioImaging communication tools, online and in print.
France-BioImaging and all the French community aims to develop and promote innovative imaging technologies and methods. But microscopy images can also take an artistic, creative look and make the invisible world beautiful.
We are all eager to see your work !
Prizes
1 to 3 images will be awarded depending on the quantity and quality of the entries submitted. France-BioImaging will cover the registration fees for one 2024 microscopy related event of the winners’ choice (FOM, ELMI, EMC, COMULIS conference, etc.).
Important: Only French or foreign participants affiliated to a French institution can enter the contest. Foreign participants non-affiliated to a French institution can submit images and will be featured in the gallery, but will not be evaluated as part of the contest.
Submission deadline: Friday, November 10th, 2023, 23h59 UTC+2.
We are happy to announce our 8th France-BioImaging Annual Meeting! Happening on December 13th and 14th 2023, this year’s edition will be hosted by our new Toulouse node at the Centre de Biologie Intégrative (Toulouse, France).
The Annual meeting will highlight France-BioImaging’s development and perspectives. Imaging scientists and users from the infrastructure’s nodes will present their key projects and demonstrate how they have benefited from France-BioImaging and its community.
More information about the program and the registration coming soon!
Following the final decision of France-BioImaging Institutional Committee on February 21th, 2023, we are delighted to announce that two new nodes are joining France-BioImaging: the Alsace Node and the Toulouse Node.
The new Alsace Node is composed of six imaging facilities: QuEST, the Cell Imaging Facility from IBMP, PIV, PI2, PIC-STRA and PMC. The node has also six highly visible R&D teams (from IRIMAS, LBP, ICube, IGBMC and IPHC) expert in microscopy techniques and tools.
Located in Strasbourg, Illkirch and Mulhouse, the Alsace node is offering high level technical and innovative methodological expertise in multi-scale imaging at the interface between biology, chemistry, optics and physics, from the atom to the small animal/plant.
The Alsace Node has a strong expertise in probes with the development of highly innovative fluorescent probes and luminescent nanoparticles.
The node provides cutting-edge technologies and methodologies, with among others:
Tomographic diffractive microscopy, for 3D label-free imaging at cellular level, with an improved resolution compared to conventional microscopes, and, not being limited by possibly weak fluorescence, potentially at high speed (several 3D images/s)
Single particle tracking and time-resolved luminescence microscopy, to image upconverting nanoparticles (UCNPs). Due to their anti-Stokes emission, UCNPs allow imaging applications with exceptional signal to noise ratio.
Single-shot full-field optical coherence tomography, extracts an FF-OCT image from a single interference acquisition, enabling single-shot high-resolution imaging within turbid media such as biomedical samples.
SharpViSu & ClusterViSu, development of an integrated software for image reconstruction, correction, co-localization, resolution estimation, segmentation and clustering of labelled complexes
A large range of molecular and nanoparticle probes for SR and advanced microscopy techniques as well as molecular and supramolecular complexes for anti-Stokes imaging at the molecular level have been developed.
The new Toulouse node is composed of a large nationally recognized multi-site core facility: Toulouse Reseau Imagerie. Distributed on Toulouse greater area, the facility is divided between medical science, fondamental science, cancer and rejuvenation, and agro-bio science. Moreover, eight R&D teams complete the node and supports the facility (from LAAS, CBI, IPBS, IRSD and IMT).
The Toulouse node aims to maintain the level of scientific excellence in response to the needs of users and the concerns of host laboratories. Four scientific axes are conducted: mechano-biology, molecules and single cells, whole organisms, image processing and quantitative data analysis.
The mission of the node is also to develop original devices to explore biophysical properties in living samples, to work at the interface between machine and sample and to develop artificial intelligence applied to bioimaging.
The node provides cutting-edge technologies and methodologies, with among others:
Random illumination microscopy, a super-resolution microscopy technique, interesting for its robustness
Protrusion force microscopy, combination of micro-fabrication, imaging approaches, including Atomic Force Microscopy, dSTORM coupled to supercritical angle fluorescence, and random illumination
Cryomethods for electron microscopy, includes sample preparation of frozen samples for cryo-microscopy, in view of bridging structural biology and cell biology.
ANchOR technology, a labeling system based on ParR/ParB labeling system from bacteria, which allowed the strong fluorescent labeling of genomic site with small DNA insert.
Microfabrication for organoids, 3D bioprinted scaffolds have been adapted to permit 3D characterization at the organoid and tissue scale
Welcome to the FBI Alsace Node and the FBI Toulouse Node!
an Advanced, hands-on Training course
on applications of cellular imaging to biological questions
Montpellier
January 18-22, 2016
The aim of FBIAT is to show how key biological questions can be addressed with advanced cellular imaging techniques. Thus it is not only a training course on state-of-the-art imaging techniques, but additionally aims at training people on how building an experimental strategy that uses these techniques, alone or in combination, to address a specific biological problem.
In the morning, the course will have plenary lectures that introduce specific techniques and how these can solve biologically-relevant questions. In the afternoon, hands-on practicals will train attendants on these techniques, providing a complete view of the experimental flow, from sample preparation to data analysis, interpretation and, when relevant, modelization. Advanced microscopy techniques covered during the workshop include : super-resolution microscopies (PALM / STORM, Structured Illumination), Single Particle Tracking, RNA imaging, Correlation based microscopies and Atomic Force Microscopy. Trainees will choose a single module centered on their biological question of interest (see flyer)
Every module will have 3 practical sessions, each session being centered on a technique, plus one session dedicated to data analysis. To guaranty access to set-ups and proper training, each practical session will guest only 3 persons. The sessions will be run in parallel, such that each module will accept 8/9 participants (45 in total for the entire event).
By providing access to top training structures and lecturers, our aim to reach an international audience. Participants will thus be selected according to their previous training and adequation of the course to their needs. We will consider applications from PhD students, post-docs, staff scientists and young PIs.
The Multi-dimensionnal Fluorescence Photonic Microscopy Technological Network (RTmfm) supports and promotes methodological and knowledge exchanges in the field of photonic microscopy devoted to life science. We organizes every year, since 2004, a national meeting of engineers and researchers working in imaging facilities over the life science french institutes. This meeting is held in a different location each year to highlight the technological and organizational characteristics of a place.
Held over two days, the different topics raised by the speakers cover technological aspects as well as organizational and collaborative tools to manage facilities.
Evolutions and activities of the different working groups of the network (Metrology, Fluorescence Lifetime Imaging Microscopy, Arduino) and all the trainings organized by the network each year are presented and new propositions are debated.
This year the meeting is organised in Villefranche sur Mer and speakers will talk about new detectors in microscopy, batch image analysis developments or Web Images & Data Environment… A presentation and a visit of the Oceanology Institute and its imaging facilities will be organised. To get more informations see our website : rtmfm.cnrs.fr in “news” section.
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viewed_cookie_policy
11 months
The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.