EXPERTISE
mouse models
We culture mouse embryonic stem cells and perform gene targeting by using Crispr/Cas9 and HDR. Our experience with genome modification allows us to generate unique models to interrogate disease models with precision.
Gene Editing
Crispr-Cas9 based gene editing offers genome editing with unparalleled specificity and speed. All trainees learn this technology which we apply in cell lines and stem cells.
Stem Cell Biology
The ability to generate patient-specific pluripotent stem cells gives hope that we can grow replacement kidneys ‘in a dish’ that can someday be used in transplantation. Understanding the potential of kidney organoids is a major focus.
scRNA-Seq
We are leveraging single cell RNA-seq approaches including DropSeq, sNucDropSeq, InDrops and FACS-Seq to generate transcriptional atlases of kidney organoids and adult kidney in health and during the course of disease.
The Lab
Over 100,000 people per year develop kidney failure in the US and most are treated with dialysis therapy. While life-saving, this procedure is costly, inconvenient and accelerates heart disease.
An average dialysis patient has a 1 in 5 chance of dying every year. Paying for dialysis costs 7 percent of the entire Medicare budget, even though these patients make up only 1 percent of the Medicare population.
In The Humphreys Lab we are developing new and innovative treatments to help patients with kidney disease. We are using human stem cells to generate kidney organoids in a dish, with a goal of one day transplanting them into patients with kidney failure. We also study the kidney’s ability to regenerate itself so that we can harness this ability for therapeutic uses.
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Genetic mouse models
We have created 5 transgenic and 3 knockin mouse lines with 6 more in production
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Crispr-Cas9
We are using gene editing to create novel KO and KI iPS and mouse ES lines
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Gene Profiling
We use RNA-Seq to expression profile kidney cell types
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Human kidney single cell RNA-seq
We perform DropSeq and InDrops on organoids and kidney biopsies
Our Team
Benjamin D. Humphreys MD, PhD
monica Chang-panesso MD
Lucy Fan
Flavia Gomes-machado PhD
Yoichiro Ikeda MD, PhD
Shiyo Ikeda MD, PhD
Farid Kadyrov, BS
Aileen Lu
Eoghainín Ó hAinmhire PhD
Ayano Miyagi MSc
Zhao Sun PhD
Kohei Uchimura PhD
Haojia Wu PhD
Recent Work
Published
Support Our Mission to Cure Kidney Failure
Lab News
We are Hiring: Staff Scientist – Single Cell RNA-Seq and Informatics
The field of single cell transcriptomincs by RNA-Seq at high-throughput scale is revolutionizing biological investigation. Microfluidic droplet technologies allow co-encapsulation of a cell, barcoded DNA oligonucleotides and cell lysis buffer within a tiny droplet of about 2 nanoliters. These transformative approaches allow for parallel processing of thousands of cells with great efficiency and precision and[…]
Culprit responsible for calcified blood vessels in kidney disease identified
Scientists have implicated a type of stem cell they believe is responsible for calcified blood vessels common in patients with chronic kidney disease. The research will guide future studies into ways to block minerals from building up inside blood vessels and exacerbating atherosclerosis, the hardening of the arteries. The study, led by researchers at[…]
Postdoctoral Fellowship in hPSC Differentiation
A funded postdoctoral position is available in the Division of Nephrology at Washington University in St. Louis. The Humphreys laboratory (http://humphreyslab.com/) investigates the cellular and molecular mechanisms of adult kidney injury and repair. We are exploring the role of developmental signaling pathways (Hh, Wnt) in paracrine signaling during kidney injury and fibrosis with potential future[…]
Washington Post Opinion Piece on Stem-Cell Grown Kidneys
Here is an opinion piece I wrote for the Washington Post from a series entitled, “Compensation for organ donors,” edited by Robert Gebelhoff. From the introduction: “Last month, a group of researchers published in the American Journal of Transplantation a cost-benefit analysis for a government-funded program that would offer $45,000 to living kidney donors. They[…]
Gli1 Identifies Myofibroblast Progenitors
In this paper published in Cell Stem Cell, we identified Gli1 as a marker for resident mesenchymal stem cells across organs (Kidney, Heart, Lung, Liver, Bone Marrow). Using lineage analysis, we show that chronic injury drives these cells to proliferate and differentiate into scar-secreting myofibroblasts. Rafael Kramann, the first author, then genetically ablated these Gli1+ progenitors[…]