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...with biological protocols and revolutionary physical approaches. However, with each new technical achievement...aim to make microscopy as a tool accessible to practically everyone.     Fig. 1: Open source hardware...convinced that most microscopy techniques can be replicated with commercially available consumer-grade components...modify and optimize the code, find and fix security-critical bugs, and contribute to constant updates of the... OpenFlexure microscope or open-source modular optical toolbox openUC2 are trying to overcome this hurdle... tools has allowed the community to regularly replicate designs worldwide. Distributing hardware via globally...reproduction of the structure in a similar way to the biological protocol, and assembly designs based around the...

...limited understanding of plant biology is a significant technical obstacle to plant synthetic biology. We ...biotechnologists face is public perception of genetic modification (GM) and synthetic biology. The mistrust and...emerging engineering technology. Monoculture and chemical spraying, mainstays of modern agriculture, are... by developing a plant biotechnology product specifically for consumer sales. Flowers that change color...a new conversation about GMOs.  Challenge #2: Technical obstacles to plant synthetic biology In addition...cannot build what we do not understand, and the complicated and unique metabolic processes of plants are ...creative problem solving like the Howard Hughes Medical Institute have begun to pivot towards plant biotechnology...

...mice at a time. Because mice are more genetically and physiologically similar to humans than many other model... of mice as model organisms is that they are genetically tractable. Mice can be easily manipulated with...also relatively straightforward to manipulate genetically. Scientists can make a new line of flies in only...reasons above but because they actually share many biological properties and processes with our own cells. ...important experimental model in the study of neurological diseases, such as Parkinson’s disease (PD). ... throughout their lifetime. Thus any genetic modification, such as expression of fluorescent protein or...embryonic development to adulthood. This ability to genetically manipulate and visualize cells and tissues allows...

...immunofluorescence? Generally speaking, IF is an application in which antibodies that have been joined to ...molecules, knowing that where you see fluorescence indicates your target’s location. Some other terms you might...ICC or a tissue in the case of IHC. IF is used specifically when we visualize the antibodies using fluorescence...bind to a single primary, resulting in signal amplification. Another reason is cost effectiveness. Generating...are not exclusive to IF, but they can have a significant impact on the outcome of your IF experiment. ...controls to show that your antibodies are binding specifically. For positive controls, aim to use samples that...antibodies you choose for your experiment will have a significant impact on the protocol you use and the ultimate...

... apply it in a clinical setting. CRISPR is often used for animal germline modification, to repair or add... important proof of concept for future preclinical and clinical work. Find Plasmids for Disease Research...exon skipping is a good option for DMD treatment. Clinical trials have used oligonucleotide exon skipping...estimated that exon skipping therapies would be applicable to 80% of DMD patients. Figure 1: Exon...that AAV-CRISPR does not cause obvious germline modification, an important finding given the controversy ...six months. Future directions and obstacles to clinical CRISPR editing Given the success of the CRISPR-mediated...researchers are very excited. This approach may also be applicable to a number of rare genetic diseases caused by...

...detect mRNA from 10 bacteria of clinical significance and four clinically relevant host biomarkers. The ...microbiome with sequencing is vast, the ability to genetically alter microbiome members is limited and many ...at Columbia University developed a method for genetically altering gut microbiome members in their native...modular suite of plasmids (pGT) with various replicative origins that can be used for broad or narrow ... analyze gut microbiota and host biomarkers In clinical and diagnostic labs, deep sequencing and qPCR ...The lab validated their platform on clinical stool samples by comparison to qPCR and demonstrated that it...Central PMCID: PMC5963681.  Meyer, Richard. "Replication and conjugative mobilization of broad host-range...

...Bárbara Pinho, a science communicator at the Portuguese science museum "Fábrica Centro Ciência Viva" in... these stromal cell modifications, stromal cells are also constantly communicating with a tumor, proving... is currently a science communicator at the Portuguese science museum "Fábrica Centro Ciência Viva" in...tumor recurrence and poor clinical outcome in human breast cancers." The American journal of pathology 174.6...reprograming influence tumors development? Being pathological active regions, microenvironments shape a tumor...Proficient in transportation, exosomes are tools of communication and provide malignancy to the microenvironment...interested in science journalism and writing about biomedical issues. Follow her on Twitter @BrbaraPinho6. ...

...these types of bigger picture problems systematically and logically is as useful for finishing your thesis... but this skill is not just about reacting to technical issues. This skill also comes into play while ...defining problem solving skills as: One’s ability to logically think through a problem/task/situation, come up...Problem-solving overlaps heavily with other skills such as critical thinking, decision making, creativity, or data...might even be expected to write up a report to communicate your findings to your colleagues. So perhaps ... really are, while also practicing systematic, logical thinking.  If you are already a lab veteran at ... to troubleshoot; you probably did not just automatically come to a solution. Consider the thoughts that...

... DNA – right? RNA performs almost all of its biological functions in our cells in the single strand form...generate dsRNA as part of their infection and/or replication process within the host. dsRNA viruses are inherently...generate dsRNA intermediates as part of the viral replication process. dsDNA viruses yield dsRNA through a ...machinery of the host. This pathway has been clinically exploited for antiviral purposes similar to that...sequence. Once a compatible sequence is found (typically RNA that the RNAi is designed against), RISC can...target mRNA. These RNA tools have been used in clinical therapy to target pathogenic proteins, as well...and insecticides, an advancement over previous chemical versions with toxicity to many organisms. ...

...through our lab using barcoded tubes and plates. The critical pieces of information for a given plasmid are ...plasmid sequence. Other information may also be critical to the maintenance and use of certain plasmids...access and use the materials they need, and avoid duplicating your effort. In addition, if you should choose...for the process. Always sequence verify Once the physical sample and its associated information are at Addgene...recover around 750 bp of clean sequence from a typical reaction, or about 250 amino acids worth, so make... for more tips on sequence analysis, plasmid verification, and using NCBI BLAST. Tips for high-throughput...comparable success rates and sequence quality, which is critical for the efficient handling of large numbers of...

...Red arrows indicate a conversion directly catalyzed by the base editor. Black arrows indicate natural cellular...editors (CBEs) and adenine base editors (ABEs) chemically modify target bases without breaking the DNA ...one-ring pyrimidine base. This is a far more complex chemical task, not a job for a single enzyme. Base ...editing works in general. Base editors use either catalytically dead Cas9 (dCas9) or a Cas9 nickase (nCas9) ... an engineered adenosine deaminase capable of chemically converting adenosine (A) to inosine (I, treated...converting the C base to uracil (U). This is the same chemical reaction performed by CBEs. However, most CBEs...improved editing in various cell types, although efficacy varied among target sequences. The researchers...

...plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid tools more ...editors Nme2Cas9 CRISPR interference in Candida albicans E. coli genome-wide inhibition library To expand...libraries also include 2,400 gRNAs without any significant hit across the E. coli genome as a negative control... control. Read the paper in Nature Communications Find the E. coli genome-wide CRISPR inhibition library...Homology-directed repair (HDR) can be used to make precise modification in genome editing. However, HDR efficiency is...efficiency up to 30-fold. Read the paper in Communications Biology Find the Cas9-PCV and PCV-Cas9 plasmids... fold and >3,800 fold in human cells with no significant reduction in editing efficiency. Read the paper...

... Molecular Biology (roughly a B average in the American system), in 2009 (at the beginning of the financial... this summer position as I felt I needed more practical lab experience to later gain a full time position...really enjoyed some aspects of the work, such as physically carrying out experiments like PCR and running...experience during research. Working abroad in rural Africa Once this position ended, I wanted to explore another...least 3 months experience working in a developing tropical country. This is why I set up a placement working...first aid. This really allowed me to see the practicalities of working in the field with the most basic...recession. As each advertised job received many applications, employers were requesting that only scientists...

...characters. A descriptive purpose focuses on the practical application of the plasmid and will help a scientist...species can be indicated in the “Species Other” column. Relevant Mutations Indicate the amino acid...usually very easy — our tech transfer team will communicate with your organization’s technology transfer ...name and match the name as it appears in its publication or as it is commonly known in your lab. Plasmid...reagent/antibody, unspecified, or other. If other, indicate type in “Vector Type Other” column. For example...or room temperature. Growth Strain Please indicate which growth strain Addgene should propagate your...For plasmids that contain the R6Kγ origin of replication, choose the Pir1 strain. If your plasmid cannot...

...genetic modifications into mouse embryos. But once you generate a growing colony of genetically engineered...epigenetic modifications. Special breeding cases Whether your mouse colony consists of genetically engineered...Cre-lox lines, and how to properly control for genetically engineered mice in your experiment. As you’ve...ve learned in Part 1, there are many types of genetically engineered mice: transgenic mice, knockin and...techniques are each useful for introducing one modification into the mouse genome, they are not commonly...parental mice In order to ensure that your genetic modification will be passed along to all of the offspring...getting a small piece of tissue from each mouse (typically via either a blood draw, tail clip, or toe clip...

...easier of the two, but it actually requires more technical skill to place the needle in the correct vein ...institutional oversight is required. Restraint: mechanical restraint or anesthesia Location: tail vein or...you might after getting a vaccine. Restraint: mechanical restraint Location: thigh Gauge: 25–27 Volume...xenograft models. Restraint: back scruffing or mechanical restraint Location: back or hind legs Gauge: ...between the layers of the skin. While this could theoretically be performed anywhere on the body, somewhere... correct location requires a lot of skill and anatomical knowledge. Intrathecal injections are used for...stomach. This technique involves administering medication through a feeding tube with a bulb on the end...

...lentivirus, AAV does not possess the ability to replicate itself and depends on helper viruses like adenovirus...herpes simplex virus to facilitate efficient replication. The most common production system, however, ...RNA genes; and the pRepCap plasmid containing replication factors and serotype-specific capsid genes.  ... steps of AAV production, iodixanol gradient purification, and AAV titration by qPCR.   Pro tip! An optional...al., 2010). For certain in vitro and in vivo applications, you can consider using unpurified AAV from ...Benyamini et al., 2023) to save time and cost.  Purification To purify your rAAV from your supernatant, you...recommend using a Tris-based lysis buffer and sonication.  The obtained virions from cells and supernatant...

...What’s behind these sights are an abundance of biological molecules like chromoproteins, fluorescent proteins...proteins and luminescence have been widely used in biological research for a long time, chromoproteins are ...just now being developed for a broad range of biological inquiries.  What is a chromoprotein and how ...photosynthetic activity. This still allows photosynthetically active wavelengths to reach zooxanthellae... sequencing are more definitive, but visual identification is a good place to start before taking on more...resources are limited or for bioart and teaching applications. Find a chromoprotein for your experiment! ...events: The plasmid carrying the desired genetic modification integrates into the genome (Figure 3). Here,...

...CRISPR mammalian expression systems, the typical applications for each, and potential delivery methods...well as suitable applications. Expression System Components of System Application Mammalian expression...Select the appropriate CRISPR tools for your application: Wildtype Cas9 or Cas9 nickase are appropriate... or introducing mutations and tags, while a catalytically dead dCas9 can be used in conjunction with activator...or more sgRNAs and Cas9 are required for any application. If you want to include a homology directed repair... be constitutive or inducible. U6 promoter is typically used for gRNA. May contain reporter gene (e.g....key features of common  delivery methods below: Chemical transfection   Lipid mediated Cationic polymers...

...Lee and Pantelis Tsoulfas of the Department of Neurological Surgery at the University of Miami. The beginning...expressing eGFP under the human ubiquitin C promoter. Anatomical abbreviations: Gr= Gracile tract, Cu= Cuneate...originally named orthogonal-plane fluorescence optical sectioning (OPFOS) (2). Arne Voie, David Burns ...of LSFM microscopes (3,4). After this initial application, Stelzer’s group described the single-plane or.... confocal microscopy In confocal microscopes, optical sectioning of a specimen is based on discriminating...used in LSFM. In LSFM the laser light sheet, typically 2-6  microns, illuminates only one thin plane ... milliseconds to acquire one image, thereby significantly reducing the time it takes to image through ...