Researchers generate kidney tubular cells from stem cells
Researchers have successfully coaxed stem cells to become kidney tubular cells, a significant advance toward one day using regenerative medicine, rather than dialysis and transplantation, to treat kidney failure. The findings are published in the Journal of the American Society of Nephrology (JASN).
Chronic kidney disease is a major global public health problem, and when patients progress to kidney failure, their treatment options are limited to dialysis and kidney transplantation. Regenerative medicine -- which involves rebuilding or repairing tissues and organs -- may offer a promising alternative.
Albert Lam, MD, Benjamin Freedman, PhD, Ryuji Morizane, MD, PhD (Brigham and Women's Hospital), and their colleagues have been working for the past five years to develop strategies to coax human pluripotent stem cells -- particularly human embryonic stem (ES) cells and human induced pluripotent stem (iPS) cell -- into kidney cells for the purposes of kidney regeneration.
"Our goal was to develop a simple, efficient, and reproducible method of differentiating human pluripotent stem cells into cells of the intermediate mesoderm, the earliest tissue in the developing embryo that is fated to give rise to the kidneys," said Dr. Lam. He noted that these cells would be the "starting blocks" for deriving more specific kidney cells.
The researchers discovered a cocktail of chemicals which, when added to stem cells in a precise order, causes them to turn off genes found in ES cells and turn on genes found in kidney cells, in the same order that they turn on during embryonic kidney development. The investigators were able to differentiate both human ES cells and human iPS cells into cells expressing PAX2 and LHX1, two key markers of the intermediate mesoderm. The iPS cells were derived by transforming fibroblasts obtained from adult skin biopsies to pluripotent cells, making the techniques applicable to personalized approaches where the starting cells can be derived from skin cells of a patient. The differentiated cells expressed multiple genes expressed in intermediate mesoderm and could spontaneously give rise to tubular structures that expressed markers of mature kidney tubules. The researchers could then differentiate them further into cells expressing SIX2, SALL1, and WT1, important markers of the metanephric cap mesenchyme, a critical stage of kidney differentiation. In kidney development, the metanephric cap mesenchyme contains a population of progenitor cells that give rise to nearly all of the epithelial cells of the kidney.
The cells also continued to behave like kidney cells when transplanted into adult or embryonic mouse kidneys, giving hope that investigators might one day be able to create kidney tissues that could function in a patient and would be 100% immunocompatible.
"We believe that the successful derivation of kidney progenitor cells or functional kidney cells from human pluripotent stem cells will have an enormous impact on a variety of clinical and translational applications, including kidney tissue bioengineering, renal assist devices to treat acute and chronic kidney injury, drug toxicity screening, screening for novel therapeutics, and human kidney disease modeling," said Dr. Lam.
Study co-authors include Paul Lerou, MD, M. Todd Valerius, PhD, and Joseph Bonventre, MD, PhD (senior author).
Welcome to SUV System Ltd!
SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.
We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.
SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com
Electronic Components distributor:http://www.suvsystem.com
Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html
IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html
LED Distributor:http://www.suvsystem.com/l/LED-1.html
Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html
Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html
Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html
Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html
SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc
we are focus on the following fields,and hope we can help you.
LED part Electronic News ELPIDA IC DIODES Transistors HARRIS IC TI IC Bipolar Transistors IC(Integrated Circuits) AD IC IR transistor NEC Diodes Xilinx IC TOSHIBA Diodes YAGEO Resistors ON Transistors High Precision Resistors ST Transistors MURATA IC Switches NXP Transistors INTERSIL IC Ligitek LED FAIRCHILD diodes ON Diodes Industrial IC LINEAR IC ALTERA IC Connectors AVX Resistors LITTELFUSE Diodes About US IDT IC PANASONIC Fast Recovery Diodes BB IC Civil IC Texas Instruments(TI) IC Other Parts IR Diodes Atmel IC
http://www.suvsystem.com/a/8381.aspx
