Navigation Links
UAB researchers cure type 1 diabetes in dogs
Date:2/7/2013

Researchers from the Universitat Autnoma de Barcelona (UAB), led by Ftima Bosch, have shown for the first time that it is possible to cure diabetes in large animals with a single session of gene therapy. As published this week in Diabetes, the principal journal for research on the disease, after a single gene therapy session, the dogs recover their health and no longer show symptoms of the disease. In some cases, monitoring continued for over four years, with no recurrence of symptoms.

The therapy is minimally invasive. It consists of a single session of various injections in the animal's rear legs using simple needles that are commonly used in cosmetic treatments. These injections introduce gene therapy vectors, with a dual objective: to express the insulin gene, on the one hand, and that of glucokinase, on the other. Glucokinase is an enzyme that regulates the uptake of glucose from the blood. When both genes act simultaneously they function as a "glucose sensor", which automatically regulates the uptake of glucose from the blood, thus reducing diabetic hyperglycemia (the excess of blood sugar associated with the disease).

As Ftima Bosch, the head researcher, points out, "this study is the first to demonstrate a long-term cure for diabetes in a large animal model using gene therapy."

This same research group had already tested this type of therapy on mice, but the excellent results obtained for the first time with large animals lays the foundations for the clinical translation of this gene therapy approach to veterinary medicine and eventually to diabetic patients.

The study was led by the head of the UAB's Centre for Animal Biotechnology and Gene Therapy (CBATEG) Ftima Bosch, and involved the Department of Biochemistry and Molecular Biology of the UAB, the Department of Medicine and Animal Surgery of the UAB, the Faculty of Veterinary Science of the UAB, the Department of Animal Health and Anatomy of the UAB, the Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), the Children's Hospital of Philadelphia (USA) and the Howard Hughes Medical Institute of Philadelphia (USA).

A safe and efficacious gene therapy

The study provides ample data showing the safety of gene therapy mediated by adeno-associated vectors (AAV) in diabetic dogs. The therapy has proved to be safe and efficacious: it is based on the transfer of two genes to the muscle of adult animals using a new generation of very safe vectors known as adeno-associated vectors. These vectors, derived from non-pathogenic viruses, are widely used in gene therapy and have been successful in treating several diseases.

In fact, the first gene therapy medicine ever approved by the European Medicines Agency, named Glybera, makes use of adeno-associated vectors to treat a metabolic disease caused by a deficiency of lipoprotein lipase and the resulting accumulation of triglycerides in the blood.

Long-term control of the disease

Dogs treated with a single administration of gene therapy showed good glucose control at all times, both when fasting and when fed, improving on that of dogs given daily insulin injections, and with no episodes of hypoglycemia, even after exercise. Furthermore, the dogs treated with adeno-associated vectors improved their body weight and had not developed secondary complications four years after the treatment.

The study is the first to report optimal long-term control of diabetes in large animals. This had never before been achieved with any other innovative therapies for diabetes. The study is also the first to report that a single administration of genes to diabetic dogs is able to maintain normoglycemia over the long term (more than 4 years). As well as achieving normoglycemia, the dogs had normal levels of glycosylated proteins and developed no secondary complications of diabetes after more than 4 years with the disease.

Application in diabetic patients

There have been multiple clinical trials in which AAV vectors have been introduced into skeletal muscle, so the strategy reported in this study is feasible for clinical translation. Future safety and efficacy studies will provide the bases for initiating a clinical veterinary trial of diabetes treatment for companion animals, which will supply key information for eventual trials with humans. In conclusion, this study paves the way for the clinical translation of this approach to gene therapy to veterinary medicine, and eventually to diabetic patients.

Diabetes mellitus

Diabetes mellitus is the most common metabolic disease, and a large number of patients need insulin treatment to survive. In spite of the use of insulin injections to control the disease, these patients often develop serious secondary complications like blindness, kidney damage or amputation of limbs. Moreover, in order to achieve good blood glucose control, insulin has to be injected two or three times a day, which brings a risk of hypoglycemia episodes (lowering of blood sugar): an additional problem that comes on top of the other hardships of the treatment.


'/>"/>
Contact: Ftima Bosch
fatima.bosch@uab.cat
34-935-814-182
Universitat Autonoma de Barcelona
Source:Eurekalert  

Related medicine news :

1. University of Minnesota researchers discover enzyme behind breast cancer mutations
2. Yale researchers spot attention deficits in babies who later develop autism
3. Researchers use new molecular inhibitors to successfully hit difficult cancer target
4. Researchers discover mutations linked to relapse of childhood leukemia
5. Moffitt Cancer Center researchers develop automated breast density test linked to cancer risk
6. Leading researchers warn of brain drain as scientists struggle to find funding
7. Researchers Identify Involuntary Tobacco Smoke Exposure in Boston Public Housing Authority Residents with Salivary Cotinine Testing from Salimetrics.
8. Researchers help confirm value of flow-diverting device for most challenging aneurysms
9. Researchers improve medical units to reduce nursing fatigue, cut costs
10. Researchers find gene that turns up effect of chemotherapy
11. Israeli researchers to participate in European Commission flagship
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
UAB researchers cure type 1 diabetes in dogs
(Date:3/24/2017)... ... March 24, 2017 , ... In just two ... Frame vertical micro-veggies garden on Kickstarter . Surpassing the $100,000 milestone so ... nearly 2,000 consumers (and counting) already backing the campaign. , “We are ...
(Date:3/24/2017)... NY (PRWEB) , ... March 24, 2017 , ... The ... and White Plains, N.Y., is pleased to announce Westchester resident Lauren C. Enea has ... law clerk for the firm, will concentrate her practice in elder law, Medicaid planning ...
(Date:3/24/2017)... ... March 24, 2017 , ... Judy Buchanan, co-owner of Serenity ... MD. Judy says, “I am passionate about sharing Reiki as a holistic, complementary ... and challenging time.” , A Certified Medical Reiki™ Master trained by Raven Keys ...
(Date:3/24/2017)... ... March 24, 2017 , ... “The Communion of Saints: A ... God in congregations across the United States. “The Communion of Saints” is ... who has served congregations in seven states throughout his long career of devotion ...
(Date:3/23/2017)... ... March 23, 2017 , ... The physicians of KSF Orthopaedic ... greater Houston Area. The new location is located at 2255 E. Mossy Oaks Rd., ... Village. This newest location will provide patients living in the north Houston area (The ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... Research and Markets has announced the addition ... Replacement Procedure By Technique, Repair Procedure By Technique, By Region, By ... ... forecasted to grow at a CAGR of 13.35% during 2016-2021 ... rising aging population, growth in population with heart disease and rising ...
(Date:3/23/2017)... , March 23, 2017 ... report created through extensive primary research (inputs from ... report aims to present the analysis of global ... Procedure (Replacement and Repair); Replacement Procedure By Technique ... By Technique (Surgical Devices, Balloon Valvuloplasty, Transcatheter Mitral ...
(Date:3/23/2017)... 23, 2017 As a result of ... the prevalence of allergic diseases, cutting edge developments ... revolutionising the ways in which pharmaceutical and biotech ... promises to be both a high quality meeting ... interest groups, immunologists, research scholars and doctors. The ...
Breaking Medicine Technology: