Encapsulife Prepares for Human Trials
Following on Successful Collaboration with Harvard Medical School on Chimpanzees
February, 2012 — A Statement by Encapsulife Chairman, Dr. Taylor Wang: “We are now entering the third year of an important and successful three-year collaboration with Harvard Medical School. Our recent success in diabetes management in NHP chimpanzee is very encouraging. Using our Bio-artificial pancreas ‘patch’ technology, we have demonstrated long-term islet in vivo survival. We should be in the position to address FDA requirements for human clinical trials this year.”
Encapsulife Files Patent Application for Bio-Artifical Pancreas "Patch"
Patch Technology to be Tested in Primate Trials
January, 2010 — Encapsulife has filed a patent application with the U.S. patent and Trademark Office related to the invention of a bio-artificial pancreas "patch." The invention successfully holds large numbers of encapsulated islet cells in formation while maintaining sufficient mass-transport capabilities to sustain functionality of the islet cells in-vivo and the production of insulin. No harmful immunosuppression drugs are required to prevent rejection by the host immune system.
Encapsulife Publishes New Peer-Reviewed Research
Immunoisolation of Transplanted Beta Cells Reverses Diabetes in Large Animal Trials Without Immunosuppression
A bio-artificial pancreas “patch” with encapsulated islet cells, ready for simple subcutaneous transplant. No immunosuppression drugs are required to prevent rejection.
A single encapsulated cluster of islet cells (very high magnification).
Utilizing insights from compound droplet experiments performed in the microgravity of NASA Shuttle Mission STS-51-B, Encapsulife founder, Dr. Taylor Wang, has developed an immunoisolation encapsulation system that protects cellular transplants, and sustains cell function without immunosuppression drugs and their resulting negative side effects.
This novel immunoisolation system is a multi-component, multi-membrane capsule that allows independent optimization of all capsule design parameters ensuring reproducible functions in large animals and humans. Results of Encapsulife's successful large animal trials, have recently been published in peer-reviewed research in Transplantation Journal. In this landmark research, encapsulated canine pancreatic islets were transplanted into dogs rendered diabetic by total pancreatectomy. No immunosuppression or anti-inflammatory therapy was used.
The allotransplantations of encapsulated islets were well tolerated and biocompatible, and normalized fasting blood glucose levels in all of 9 dogs, were achieved for over two hundred days, with a single transplantation. Re-transplantation of encapsulated islets a "booster" was effective in providing glycemic control beyond the initial 200 days.
Other immunoisolation systems have been tested in large animal models and one in humans; many of those experiments were performed in spontaneous diabetic subjects or utilized immunosuppressive agents. Many of these experiments were not or cannot be reproduced.
Encapsulife's advancements in living cell transplantation are intended to lead to alternative approaches for islet transplantation treatment for diabetic patients. Encapsuife collaborations are now under way with leading research groups to advance this science to clinical human trials. This approach may also benefit patients suffering from other hormone deficiency diseases including liver disease and Parkinson's disease.
Notes on Graphic
Top Panel: Data points indicate the venous plasma glucose concentrations collected 12-18 hours following a meal. A level of between 80 and 120 is deemed "normal."
Lower Panel: Indicates the daily dosage of subcutaneous porcine insulin administered, in an attempt to maintain normal plasma glucose concentrations (blood sugar). Two types of insulin are used in combination. Upper portion of bar indicates NPH insulin and lower portion of bar indicates Regular insulin. After Day 18 NO Insulin Injections were administered.
The data associated with Encapsulife's research remains part of Encapsulife's patented intellectual property and portfolio of trade secrets. However, the data below, which has been reviewed by scientific peers and research supporters is representative of diabetes reversal in one of the 9 canine subjects in Encapsulife's recently completed large animal trials.
- On Day 1, the subject's pancreas was removed, insulin production ceased, Type 1 diabetes was therefore induced, and supplemental insulin injections ("units" on vertical axis) were required to stabilize blood glucose (BG) levels and preserve life in the subject.
- On Day 10, insulin was withheld for 1 day, the diabetes BG returned to ~ 600 immediately.
- On Day 18, after partial glucose stability was recovered in the subject through insulin injections, encapsulated islets were transplanted into the subject. No immunosuppressive drugs were used.
- Days 19 through 120, transplantation was well-tolerated with minimal inflammatory response. At 120 Days, glucose levels remained normal. (HbA1c=6.0)