Redefining Control and Consistency in Anaerobic Microbiome Workflows: An Interview with Molecular Devices
In this insightful interview, Sheela Muley, Product Manager at Molecular Devices, and Dr. Sushmita Sudarshan, Application Scientist in Assay Development, delve into the exciting world of microbiome research, with a special focus on automation in anaerobic workflows. They explore how next-generation tools are revolutionizing our understanding of the uncultured majority of the microbiome and streamlining microbial screening for novel therapeutics.
Introduction to Molecular Devices Experts
Sheela Muley: As the Product Manager for Biopharma at Molecular Devices, I oversee the development and commercialization of microbial and mammalian clone-screening platforms. My expertise lies in bringing innovative solutions to the market, ensuring they meet the needs of researchers in the life sciences industry.
Dr. Sushmita Sudarshan: I am an Application Scientist in Assay Development, specializing in translating microbial workflows into automated solutions. My work focuses on high-throughput and anaerobic applications, ensuring that our tools are not only efficient but also compatible with the unique requirements of anaerobic environments.
The Importance of the Microbiome
Muley: The microbiome is a fascinating and crucial area of research. It influences our immune system, metabolism, mood, and neurological health. With trillions of microbes in our body, encoding far more genes than our human genome, understanding this complex community and translating it into therapeutics holds immense potential. However, only about a third of gut microbial species are currently culturable, leaving a significant gap in our understanding.
Challenges in Anaerobic Microbiome Workflows
Muley: One of the major challenges in anaerobic workflows is culturing strict anaerobes. The gut and many environmental microbiomes thrive in oxygen-free or low-oxygen habitats. Manual workflows inside anaerobic chambers are slow, prone to errors, and lack standardization and throughput. Preserving sample integrity, sterility, and traceability are critical aspects that require careful attention.
Introducing the QPix FLEX System
Muley: To address these challenges, we developed the QPix FLEX microbial screening platform. This compact system automates plating, streaking, colony picking, hit-picking, and liquid handling, making it compatible with anaerobic chambers. It features a high-resolution color imaging camera for morphology and pigment detection, barcode tracking to reduce human error, sterilization modes, disposable tips, and a flexible deck layout.
The QPix FLEX system has proven to be highly efficient, allowing us to pick three times more colonies in a week, saving one to three days of manual picking.
Automated Processes and Time Savings
Dr. Sudarshan: Our platform emphasizes four core automated processes: colony picking, plating and streaking, liquid handling, and hit-picking. These processes reduce manual steps, errors, and ensure consistent volume dispensing. For example, our color imaging technology enables the grouping of colonies based on RGB intensity, making it easier to differentiate pigmented or reporter strains.
By automating these steps, we save time, increase colony yield, and enhance reproducibility. Early selection of smaller colonies also helps avoid contaminant overgrowth, further improving the efficiency of the workflow.
Anaerobic-Friendly Workflows and Sample Integrity
Dr. Sudarshan: The QPix FLEX system is designed with anaerobic integration in mind. Its compact footprint allows it to fit inside standard anaerobic or hypoxic chambers. It avoids heat or compressor-based sterilization, ensuring that picking pins remain air-dried or use disposable tips without introducing oxygen or heat shock to strains.
The system has been thoroughly tested inside a hypoxic chamber with 5% hydrogen for 1.8 years, demonstrating its stability. Automation reduces the number of times plates are moved in and out of the chamber, minimizing exposure to ambient air, contamination risk, and stress.
Color Camera and Colony Morphology Classification
Dr. Sudarshan: Our system employs a 20-megapixel CMOS color camera and intelligent software to generate RGB histograms for each colony image. Colonies can be classified based on color intensity and morphology parameters. For instance, a blue colony (LacZ positive) can be distinguished from a white colony (LacZ negative) using their RGB profiles.
The operator interface allows for the selection of a reference colony, and similar colonies are automatically grouped. Thresholding algorithms ensure high-fidelity detection even under low contrast, allowing for phenotype-based picking based on pigment or expression marker.
Genomics Methods for High-Throughput Workflows
Muley: For microbial identification and genomic analysis, we recommend 16S rRNA sequencing for species-level identification of anaerobic isolates. MALDI-TOF is useful for functional or protein-fingerprint data, especially for strain ID post-isolation. Combining 16S (or full-genome sequencing) with MALDI-TOF or phenotypic assays can provide a comprehensive understanding of genotype and function.
The Future of Automation in Microbiome Research
Dr. Sudarshan: Automation is democratizing microbiome culturomics, enabling labs of all sizes to participate meaningfully. By replacing manual workflows with automated, traceable processes, we can tap into the uncultured majority, accelerate probiotic discovery, and translate the microbiome into next-generation therapeutics.
Muley: Indeed, the next breakthrough in conditions like Alzheimer's, depression, or cardiovascular disease may come from the microbiome. However, it requires robust workflows and automation to scale discovery. We envision a future where automation becomes the foundation of scientific research, enabling faster, reproducible advancements across industry and academia.
Advice for Researchers
Muley: When embarking on anaerobic microbiome screening, consider the entire workflow: sample collection, maintaining anaerobic conditions, plating, isolation, colony picking, tracking, and analysis. Ensure that your instrument or workflow addresses all these steps to avoid bottlenecks.
Dr. Sudarshan: Prioritize sterility, traceability, and automation from the beginning. Use barcoding, imaging, and integrated tracking to build reproducible datasets. Don't wait to pick large colonies; automated imaging allows for earlier picks, saving time and reducing contamination risk.
About the Interviewees
Sheela Muley and Dr. Sushmita Sudarshan are experts in their fields, bringing extensive experience in life-science instrumentation, high-throughput screening, and assay commercialization. Their work contributes to the advancement of microbiome research and the development of innovative solutions in the life sciences industry.
