To test the quality of the «blood vessels» produced, the researchers cultured a chunk of tissue made from rat
liver cells using their technique.
Not exact matches
The short - chain fatty acids that aren't
used by the
cells in the colon travel to the bloodstream,
liver and to the rest of the body, where they may lead to various beneficial effects (19, 20).
Large quantities of these reverted
cells could be
used to treat anything from spinal cord injury to
liver damage without the risk of tissue rejection, said Robert Weinberg, a biologist at the Massachusetts Institute of Technology's Whitehead Institute for Biomedical Research and co-author of a study appearing in
Cell.
«
Using these new
cells we might achieve organ acceptance in
liver transplants, without touching the remaining immune system,» says co-author Luis Graca.
Using a mathematical model known as the Ising model, invented to describe phase transitions in statistical physics, such as how a substance changes from liquid to gas, the Johns Hopkins researchers calculated the probability distribution of methylation along the genome in several different human
cell types, including normal and cancerous colon, lung and
liver cells, as well as brain, skin, blood and embryonic stem
cells.
In preclinical studies
using cell models that mimicked
liver cells of patients with the rare disease Friedreich's ataxia (FA), a widely
used cholesterol - lowering drug increased a precursor of HDL (high - density lipoprotein), the «good cholesterol,» according to new research published in PLOS ONE from the Perelman School of Medicine at the University of Pennsylvania.
After watching those mice thrive for several months, Lagasse repeated the experiment
using fluorescent markers to trace the path of the
liver cells.
The researchers
used the dead guide RNAs to turn on the Pdx gene in the mice's
livers, which caused the
liver cells to produce insulin, reversing the mice's diabetes.
U.S. biotechnology company Circe Biomedical has had similar success, she said, showing in an ongoing clinical trial of a similar device
using pig
liver cells that six out of 36 patients have completely recovered without the need for transplant.
Among the many approaches they took, the researchers generated induced pluripotent stem
cells (iPSCs) from the SCARB1 - deficient person,
used them to create
liver cells, and showed these new
cells had profound reduction in their ability to take up HDL.
Realistic stem
cell therapies to replace diseased or damaged tissue may still be years away, but researchers have uncovered a promising new
use for these undifferentiated
cells: they can be programmed to become patient - specific laboratory models of inherited
liver disease.
In this study, the Hiroshima University researchers developed an animal model
using severely immunodeficient mice whose
livers were partially populated with human
cells, in order to reconstruct elements of the human immune system.
Chien Ho, professor of biological sciences at Carnegie Mellon University, and his colleagues have developed a novel way to improve delivery of chemotherapy nanodrugs by
using Intralipid ®, an FDA - approved nutrition source to temporarily blunt the reticuloendothelial system — a network of
cells and tissues found throughout the body, including in the blood, lymph nodes, spleen and
liver, that play an important role in the immune system.
The current research suggests that pancreatic cancer
cells that spread to organs that receive a blood supply rich in glucose and other nutrients, such as the
liver and lungs, acquire metabolic adaptations to
use these «natural resources» to increase their tumorigenic fitness.
The researchers have
used a similar procedure previously to create heart, brain, and
liver cells.
The study also examines the
use of lentiviral vectors for
cell delivery in treating
liver diseases, a tool traditionally
used in treating blood disorders.
«The discovery of the novel progenitor represents a fundamental advance in this field and potentially to the
liver regeneration field
using cell therapy,» said the study's senior author, Valerie Gouon - Evans, PharmD, PhD, Assistant Professor, in the Department of Developmental and Regenerative Biology, Black Family Stem Cell Institute, at the Icahn School of Medicine at Mount Si
cell therapy,» said the study's senior author, Valerie Gouon - Evans, PharmD, PhD, Assistant Professor, in the Department of Developmental and Regenerative Biology, Black Family Stem
Cell Institute, at the Icahn School of Medicine at Mount Si
Cell Institute, at the Icahn School of Medicine at Mount Sinai.
A team of multidisciplinary researchers with expertise spanning biotechnology, information technology, and medicine have
used a combination of several «omics technologies to map proteins down to the single
cell level, showing both proteins restricted to certain tissues — such as the brain, heart, or
liver — and those present in all tissues.
And by creating personalized organoids from the reprogrammed
cells of patients, scientists could study disease in a very individualized way — or maybe even
use organoid structures to replace certain damaged tissues, such as in the
liver or spinal cord.
Philip Laipis of the University of Florida, who has also observed tumors in AAV vector - treated mice, agrees, at least for studies
using a similarly high dose of AAV to target
liver cells, which are more likely than other
cell types to take up the AAV vector.
Harvard School of Public Health (HSPH) researchers have discovered that a particular type of protein (hormone) found in fat
cells helps regulate how glucose (blood sugar) is controlled and metabolized (
used for energy) in the
liver.
They're not developed enough to function as
liver transplants, but the
cell clusters do have important
uses, says McGuckin.
It therefore makes sense to
use liver cells to test the toxicity of substances.
When you're
using certain tissue types that can't replicate multiple times outside of the body —
liver and nerve
cells, for example — «that's where stem
cells are most relevant.»
Using stem
cells from umbilical cord blood, researchers are growing clusters of real
liver cells in the lab.
One of the most promising approaches involves the
use of cultured
liver cells.
A microreactor developed as part of an EU - funded collaborative research project enables cultured
liver cells to be
used as test samples.
Normally, people who are overweight face a greater risk for insulin resistance, a condition in which the body does not
use insulin effectively to shuttle glucose into
liver, fat, and muscle
cells.
In a paper published in the journal Proceedings of the National Academy of Sciences, Sangeeta Bhatia of MIT and Charles Rice of Rockefeller University describe
using microfabricated
cell cultures to sustain hepatitis B virus in human
liver cells, allowing them to study immune responses and drug treatments.
One
uses primary hepatocytes obtained from
livers donated for transplant; the second
uses stem
cells derived from human skin samples and guided into hepatocyte - like
cells, Bhatia says.
Researchers from the University of Surrey (UK), the Federal University of São Paulo and the Butantan Institute in Brazil
used an innovative 3D
liver cell examination to explore the
liver function of this snake - like amphibian.
For example, if the process were
used to create
liver cells for a drug test, the resulting product «would actually have vascularization in it that is modeled on how a
liver works.»
Because cancer
cells grow and divide rapidly, they
use a lot of energy, sucking up glucose and giving themselves away; the red coloring denotes disease in the patient's
liver and shoulder area.
A surgical ultrasound device is
used that was previously
used for
liver cell carcinomas.
Using patient - derived stem
cells known as induced pluripotent stem
cells (iPSC) to study the genetic lung /
liver disease called alpha - 1 antitrypsin (AAT) deficiency, researchers have for the first time created a disease signature that may help explain how abnormal protein leads to
liver disease.
To trace the lineage of
liver cells, scientists
used a telltale marker — the
cells» response to signals delivered by a known stem -
cell regulator called Wnt.
As the researchers showed, the rate of vesicle formation, and hence the uptake of excess bile into
liver cells, can indeed be adjusted
using drugs, at least in the
cell culture setting.
To investigate how the
liver responds to bile accumulation, the research team
used an artificial culture system, which allowed the easy manipulation of cultured
liver cells.
Using these techniques, we were able to show polyploid
liver cells protected the
liver against cancer formation in the mouse,» said Dr. Hao Zhu, Assistant Professor at CRI and a CPRIT scholar in Cancer Research.
In an elegant proof - of - principle approach, the researchers
used synthetic molecules to decrease the physical distance between the ER and mitochondria in
cells and in
liver tissue and found that this intervention impaired mitochondrial function and made mice more sensitive to high fat diet - induced insulin resistance and diabetes.
In order to determine which type of
liver cells cause this accumulation, the researchers repeated the experiment
using cultured hepatocytes.
The researchers
used electron microscopy and other imaging techniques to view thousands of
cells from the
liver tissue of lean and obese mice.
Using a novel method — design - based stereology — which enabled researchers to estimate the volume of the
liver and the total numbers and sizes of its
cells in 3D, it was found that the
liver of mice on a low protein diet had decreased by 65 %.
Geneticist Yoav Gilad of the University of Chicago and his colleagues
used a new technique to examine the genes in the
liver cells of four primates: humans, chimpanzees, orangutans and macaques.
Using an animal model, they found that TIMP - 1 recruits immune
cells by increasing the levels of a specific signaling molecule in the
liver.
He says that it may soon be possible to take healthy
liver cells from a patient whose
liver is failing and
use them to make tissue that would be stored in the laboratory.
An international team led by metabolism experts Matthias Tschöp (Helmholtz Zentrum München / Technische Universität Müchen), Richard diMarchi (Indiana University) and Timo Müller (Helmholtz Zentrum München) report in the current issue of the journal
Cell that
liver - specific delivery of the thyroid hormone T3
using glucagon corrects obesity, glucose intolerance, fatty
liver disease and atherosclerosis without causing adverse effects in other tissues.
Using cells from mice and human
livers, Toronto General Hospital Research Institute researchers demonstrated for the first time how under specific conditions, such as obesity,
liver CD8 + T
cells, white blood
cells which play an important role in the control of viral infections, become highly activated and inflammatory, reprogramming themselves into disease - driving
cells.
The researchers note that CD8 + T
cells could potentially be
used as markers for the progression of fatty
liver disease, which is expected to become the leading indication for
liver transplantation within the next one or two decades.
Lin and Artandi wondered whether they could
use telomerase expression as a marker to identify the subset of
cells responsible for regenerating the
liver during normal turnover.