Press Release: Getting Lab Equipment on the Cheap
Tübingen neuroscientists develop inexpensive, self-manufactured lab equipment
Laboratory equipment is one of the largest cost factors in neuroscience. However, many experiments can be performed with good results using self-assembled setups with 3-D printed components and self-programmed electronics. The inexpensive system called “FlyPi” developed by André Maia Chagas and Tom Baden allows for many standard lab processes including light and fluorescence microscopy, optogenetics, thermogenetics, and behavioural studies in small animals (e.g. round-worms, fruit flies, zebrafish larvae). The FlyPi system provides modular, low-cost options for research as well as training and teaching purposes. Assembly and usage instructions are made available free of charge via open source platforms.
In modern neuroscience, small animals provide insights into basic functions of the nervous system. The translucent larvae of zebrafish, the fruit fly Drosophila, or the tiny nematode (roundworm) Caenorhabditis elegans are easy to keep in large numbers. More importantly, their genomes have been completely sequenced, allowing many modifications, such as for optogenetics. With this technique nerve cells are genetically programmed to react to light, so brain areas or even individual nerve cells can in effect be “switched on” or “off” – in the live organism. This allows specific identifications of the nerve cells responsible for controlling specific functions and behaviours. The intricate equipment necessary for these experiments includes light sources with defined wavelengths and adjustable intensities; powerful cameras and microscopes; and a custom-tailored so-called “arena” for behavioural studies of live specimens. A lab can easily spend tens to even hundreds of thousands of Euros on commercially available solutions, confining top-level research and scientific training to well-endowed institutes in rich countries.
In a joint initiative, neuroscientists of the Tübingen Werner Reichardt Centre for Integrative Neuroscience (CIN) and Institute for Ophthalmic Research and the University of Sussex in Brighton have now presented the “FlyPi”. The design is based on a 3-D printed framework holding a Raspberry Pi computer and camera, cheap LEDs for lighting and simple lenses, as well as optical and thermal control circuits based on Arduino, an open-source electronic prototyping platform. Taken together, the components cost less than 100 Euros for the basic system, which can carry many add-on modules which still merely double the total. Commercially available solutions are obviously more sophisticated in some aspects. For example, spatial resolution in fluorescence microscopy ranges in the micrometers, where state-of-the-art confocal or 2-photon microscopes reach tenths of micrometers. But this factor of ten in spatial resolution compares well to a factor of up to 5,000 in cost. The FlyPi performs very well in many standard tasks needed in neuroscience labs on a day-to-day basis and is more than adequate for teaching purposes. Due to its modular nature, it can be fitted with more costly components to improve certain performance aspects – spatial resolution, for example.
The developers of the FlyPi system, André Maia Chagas and Tom Baden, share a keen interest in spreading “open labware”. That is what the growing community of scientists interested in open source, DIY engineering and gadgeteering calls projects such as this. For years now, and together with co-author Lucia Prieto Godino of the University of Lausanne, the two scientists have taught courses in 3 D printing, programming and DIY lab equipment at universities in Kenya, Uganda, Ghana, Nigeria, South Africa, Sudan and Tanzania. “These institutions have little money to spend on costly equipment”, says Baden. “We think it is very important that neuroscientific training and research open up to larger numbers of students and junior scientists in these developing countries. So we hope that, with open labware such as our FlyPi, we can offer a starting point.”
André Maia Chagas, Lucia Prieto Godino, Aristides B. Arrenberg, Tom Baden: The 100 Euro Lab: A 3-D Printable Open Source Platform for Fluorescence Microscopy, Optogenetics and Accurate Temperature Control during Behaviour of Zebrafish, Drosophila and C. Elegans. PLoS Biology 18 July 2017.
- Werner Reichardt Centre for Integrative Neuroscience