ViaCyte is developing a drug delivery system that enables implanted pancreatic progenitor cells to survive and differentiate into functioning insulin -
producing islet cells.
In addition, the molecular beacons technique http://www.lependart.com could have broad applications across regenerative medicine, because it could be used with other types of cells produced from stem cell cultures, such as brain cells or insulin -
producing islet cells.
Combining a new hydrogel material with a protein that boosts blood vessel growth could improve the success rate for transplanting insulin -
producing islet cells into persons with type 1 diabetes.
Mehlhaff CJ, Peterson ME, Patnaik AK, Carrillo JM: Insulin
producing islet cell neoplasms: Surgical considerations and general management in 35 dogs.
Not exact matches
Usually, the body's own immune system — which normally fights harmful bacteria and viruses — mistakenly destroys the insulin -
producing (
islet, or
islets of Langerhans)
cells in the pancreas.
Once a significant number of
islet cells are destroyed, you'll
produce little or no insulin.
Islet autoimmunity, detected by antibodies that appear when the immune system attacks the islet cells in the pancreas that produce insulin, is a precursor to type 1 diab
Islet autoimmunity, detected by antibodies that appear when the immune system attacks the
islet cells in the pancreas that produce insulin, is a precursor to type 1 diab
islet cells in the pancreas that
produce insulin, is a precursor to type 1 diabetes.
Transplantation of pancreatic
islets —
cell clusters that contain insulin -
producing cells — prevents severe, potentially life - threatening drops in blood sugar in people with type 1 diabetes, according to new research.
In type 1 diabetes, the immune system attacks and destroys insulin -
producing cells in the
islets of the pancreas.
New clinical trial results show that transplantation of pancreatic
islets —
cell clusters that contain insulin -
producing cells — prevents severe, potentially life - threatening drops in blood sugar in people with type 1 diabetes.
People with Type 2 diabetes have an excess of a protein called
islet amyloid polypeptide, or IAPP, and the accumulation of this protein is linked to the loss of insulin -
producing pancreatic beta
cells.
Cannabinoids
produced by the alpha
cells may in fact activate cannabinoid CB1 receptors located in the pancreatic
islets.
When the pancreatic
islets, small masses of
cells in the pancreas that
produce insulin, are exposed to high levels of nutrients — as is the case among people who eat a lot — they become inflamed.
The pancreatic
cells are supposed to mature into beta -
islet cells, which
produce the hormone insulin.
The
cells also
produce a hormone called
islet amyloid polypeptide, or IAPP.
When they briefly exposed nestin - positive
cells to a growth factor, the
cells differentiated not only into neural
cells but also into clusters that resemble the insulin -
producing islets in the pancreas.
* In type 1 diabetes, the insulin -
producing cells in the Langerhans
islets of the pancreas are destroyed because they are attacked by the body's immune system (formation of
islet autoantibodies against structures of the beta
cells).
But the extracted tissue began
producing insulin, glucagon and other hormones after the newly identified
cells were added, indicating that they were indeed progenitors capable of differentiating into all the
islet cell types, including beta
cells.
More than half of
islet cell tumors
produce excessive gastrin, which stimulates the stomach to overproduce acid.
The remaining
islet cell tumors may
produce other hormones, such as vasoactive intestinal polypeptide, which can cause severe diarrhea and lead to dehydration.
«The loss of insulin -
producing beta
cells leads to type 1 diabetes, making it an ideal target for
cell replacement therapy,» said James Shapiro, MD, PhD, FRCSC, Director of the Clinical
Islet Transplant Program, University of Alberta.
After implantation, the
cells are expected to mature into the full complement of
islet cells, including insulin -
producing beta
cells, offering a potential functional cure for patients with high - risk type 1 diabetes.
Moreover, all of the donated pancreases displayed active insulin -
producing beta
cells, with some of the
cells scattered individually and others clumped with different kinds of hormone -
producing cells in the normal pancreatic structures called
islets.
In pre-clinical experiments, hESC - derived cardiomyocytes engraft in damaged myocardium and appear to behave like native
cells; hESC - derived
islet cells engraft,
produce the hormones of the endocrine pancreas, and appear to do so under homeostatic control; etc. \ n \ nThere is no evidence of teratomas from differentiated hESC - derived
cells and minimal, if any, immune rejection.
«ViaCyte was the first to differentiate human stem
cells into glucose - responsive, insulin -
producing cells, and now we are running the first and only clinical trials of stem
cell - derived
islet replacement therapies for type 1 diabetes,» said Paul Laikind, PhD, President and CEO of ViaCyte.
The encapsulation of pancreatic
islets within mainly alginate - based macro - or microcapsules with various physical configurations may allow protecting the
islet graft without the need for immunosuppressive agents and moreover expanding the donor pool to animal tissue and novel insulin -
producing cells.
The diabetic volunteer continued to
produce insulin one year after she received a transplant of abdominal
islet cells.
Novocell also demonstrated earlier this year, that hES - derived pancreatic progenitorsdevelop into human
islet cells capable of
producing insulin in response to glucose and ameliorating diabetes in animal models.
The piece mentioned that some of the funds would support ViaCyte and our efforts to develop and test the VC - 01 ™ product, comprised of an implantable device that holds precursor
cells that upon implant in a patient are expected to differentiate to become pancreatic
islet cells that
produce insulin and other blood sugar - regulating hormones.
«These results suggest that, as a result of the FMD and re-feeding cycle, the pancreatic
islets contain an elevated number of
cells with features of progenitor
cells, which may differentiate and generate insulin -
producing cells,» noted the research.
Islet transplants Insulin is normally produced by islet or beta cells in the panc
Islet transplants Insulin is normally
produced by
islet or beta cells in the panc
islet or beta
cells in the pancreas.
That's a reference to the multiple types of
islet cells ViaCyte's technology
produces.
These sentinel units will be removed at specific time points and examined histologically to provide early insight into the progression of engraftment and maturation into pancreatic
islet cells including insulin -
producing beta
cells.
The treatment could provide what the company calls a virtual cure for Type 1 diabetes, which is caused by a lack of insulin -
producing «
islet»
cells in the pancreas.
Chong Wee Liew, Ph.D., lead author and a postdoctoral researcher in the Kulkarni lab, first examined the expression of the tribbles protein in pancreatic
islets (which house beta
cells and other hormone -
producing cells) in both humans and mice.
After implantation, these
cells are expected to become mature human
islet tissue including well - regulated beta
cells producing insulin on demand.
The VC - 01 product candidate is the first embryonic stem
cell - derived
islet replacement therapy to reach clinical testing and is currently being evaluated in patients with T1D who have minimal to no insulin -
producing beta
cell function.
When implanted, PEC - 01
cells are expected to differentiate into pancreatic
islet cells that
produce insulin and other hormones that regulate blood sugar, while the Encaptra device is designed to protect the
cells from immune destruction.
The far more nuanced and precise data
produced by single
cell analyses will allow for better understanding of pancreatic
islet function and dysfunction at the cellular level.
To create a lasting source of insulin -
producing beta
cells for transplant, we are developing new methods to promote differentiation from pancreatic stem
cells into healthy
islets.
Type 1 Diabetes mellitus (T1D) is an autoimmune disorder characterized by a loss of function of insulin
producing beta
cells in pancreatic
islets of langerhans leading to insulin insufficiency.
Poster: In vitro generation of insulin
producing cells with insulin secretion kinetics and mitochondrial respiration similar to adult human
islets [Poster T2190] Speaker: Dr. Alireza Rezania, Senior Director, Discovery Date / Time: June 23, 7:00 p.m. to 8:00 p.m., PDT
So too do the
islet cells that manufacture insulin in the pancreas die when drugs, nay doctors, whip them to keep
producing more insulin when they are tired and sick.
A novel investigative study published in the Nov 2014 issue of the Journal of Endocrinology looked at the effects of curcumin on insulin -
producing cells within the pancreas called Beta
cells (or B -
cells) and
Islet cells, in relation to imbalanced blood sugar.
Antibodies against the inflamed pancreatic
cells are created and this process leads to dysfunction and destruction β -
cells of the
islets of Langerhans where insulin is
produced.
The
islet cells in these animals are destroyed and can not
produce insulin.
The distinct endocrine glands are the adrenals, thyroid, parathyroids, pituitary gland and
islets in the pancreas, although hormones are
produced by many
cells in other tissues.
The groups of
cells in the
islets that
produce insulin are called beta
cells.
A number of mechanisms are responsible for decreased insulin secretion or resistance, but most involve destroying
islet cells, the
cells of the pancreas that
produce insulin.
Diabetes is caused by degeneration of insulin -
producing cells in the pancreas (in the
Islets of Langerhaans to be precise).