The Herbert and Florence Irving Institute for Cancer Dynamics will continue its seminar series on the topic of mathematical sciences underpinning cancer research. The monthly seminars take place on the second Wednesday of the month, 2:00-3:00 PM EST. The presentations are open to the Columbia community (in person and online) and to researchers outside Columbia (via Zoom).
On Wednesday, December 10th (2:00 PM ET), IICD welcomes Dr. Sanjay Srivatsan from Fred Hutch Cancer Center. Seminar hosted by Dr. José L. McFaline-Figueroa. The seminar will take place in person in Schermerhorn Hall 603 (Morningside Heights campus). If you wish to attend the seminar remotely, please register using the following link: https://columbiauniversity.zoom.us/meeting/register/VtQKKrCYTkiEJNoGDx41SQ
Title: Capsule-Based Genome Sequencing and Lineage Tracing
Abstract: As cells divide and age they acquire mutations at a rate of 1-2 mutations per cell division. These mutations, which are stably inherited across generations, could serve as time-calibrated lineage marks; however, detecting these mutations has lagged severely due to their sparsity and a lack of methods for cloning whole genomes en masse. To address these problems we developed a novel semi-permeable capsule (SPC) formulation, capable of isolating single cells and their contents while facilitating biomolecular exchange based on size-selectivity. We demonstrate that SPCs facilitate the simultaneous, clonal expansion of over 200,000 cellular colonies, unbiased nucleic acid amplification, and develop a combinatorial indexing-based single-cell whole genome sequencing (CapWGS) protocol. Using CapWGS we profile cells harboring an ultramutator polymerase ε allele (POLE P286R), which increases the mutation rate per cell division by three orders of magnitude. Sequencing 1000 single-cell genomes from POLE P286R harboring cells, facilitates the recovery of distributed lineage marks, enables the reconstruction of time-calibrated cellular genealogies and reveals a rapid, recurrent and adaptive response to ultramutation through whole genome amplification. These capsule-based approaches establish a framework for the detection and reconstruction of time-calibrated lineages through the cloning and sequencing of ultramutated cells from culture or organisms.
Bio: Sanjay Srivatsan is an Assistant Professor in the Basic Sciences Division of the Fred Hutch Cancer Center. He received his undergraduate training at the University of California, Berkeley in Bioengineering, followed by training in the labs of Cole Trapnell, Jay Shendure and David Baker. He now runs a genomics lab where he builds tools to measure, model and write genomes.
If you would like to meet one-on-one (possibly via Zoom) or attend the lunch or dinner with the speaker, please contact the event organizer.