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Leila Haery

Leila Haery is a Research Scientist at Addgene and is interested in science education.

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Rabies and Neuronal Tracing

Posted by Leila Haery on May 29, 2018 9:51:06 AM

Why study neural connectivity?

One of the early lessons many of us learned in biology is that the body’s architecture and plumbing are important. We started with learning the head is connected to the neck. Shortly after, we learned about organs and the jobs they perform. This became foundational later on when we studied biological processes, like how our stem cells are housed in specific locations and give rise to progenitors during growth and development or that blood flows through the heart and lungs and oxygenates the body. However, in neuroscience, this architecture is frequently still an open question. The connections between neurons are what define how the brain operates, and thus, are a major part of the answer to many biological questions about the brain. To address this, molecular tools to map neuronal connectivity are widely used in neuroscience. In this post, I’ll describe how rabies virus (RABV) can be used in the brain to visualize how neurons are connected.

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Topics: Viral Vectors

Switch to GECO? An overview of AAV Encoded Calcium Sensors

Posted by Leila Haery on Apr 26, 2018 9:24:32 AM

As part of our partnership with the Penn Vector Core, we will be expanding our inventory of tools for calcium sensing. In this post, we’ll review the main categories of sensors we’ll have available.

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Topics: Viral Vectors, Fluorescent Proteins

AAV Titers: Where do they come from and what do they mean?

Posted by Leila Haery on Nov 15, 2017 10:00:00 AM

Remember the game show “The $25,000 Pyramid” where one player tries to get the other to guess a category by listing off things that fall into that category? Okay, let’s play! I’ll list the examples and you try to guess the category:

ELISA...
qPCR...
Digital droplet PCR...
DNA dot blot...
Transduction assay...
SDS-PAGE...
Electron microscopy…

Any guesses?

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Topics: Viral Vectors

How Dry Ice Affects Sample pH & How to Avoid It

Posted by Leila Haery on Jun 20, 2017 10:30:00 AM

We’re always looking for ways to improve our shipment processes. After reading a publication describing how short term storage on dry ice can shift sample pH, we wondered whether or not the dry ice we use to keep viruses frozen during shipment was having an impact on the samples. We therefore devised a few experiments to determine if our tubes were permeable to the CO2 released from dry ice, and whether this affected the pH of our viral samples. Read on to learn how aqueous samples might be affected by dry ice, and specifically how dry ice can affect virus from Addgene.

Bottom line: there’s good news and there’s bad news. The bad news is that some of tubes’ o-rings are, in fact, permeable to CO2 at low temperatures (-80°C) and once in the tube, the CO2 can alter the pH of the liquid sample. The good news is that this effect is reversible and the pH shift can be prevented. Keep this information in mind if you’re planning on shipping something on dry ice or if you’re receiving samples on dry ice - it may prevent you from seeing some unexpected results.

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Topics: Viral Vectors

Beginner's Guide to Viral Vectors

Posted by Leila Haery on Jun 2, 2017 10:30:00 AM

You can use viral vectors for many experimental purposes. To help you make sense of all the viral vector information that's out there, Addgenie Leila Haery has summed up some of the most important characteristics of retroviruses, lentiviruses, AAVs, and adenoviruses in this easy-to-use guide. Print out the guide and use it for quick reference when you're designing your next virus experiment.

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Topics: Viral Vectors

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