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Transient Expression in Red Beet of a Biopharmaceutical Candidate Vaccine for Type-1 Diabetes
Published on: March 19, 2019
Salmonella-Based Vaccine: A Promising Strategy for Type 1 Diabetes.
Mahmoud Singer1, Fouad Kandeel2, Mohamed I Husseiny2
1Department of Radiological Sciences, School of Medicine, University of California Irvine, Irvine, CA 92697, USA.
Vaccines
|May 7, 2025
Summary
A novel oral vaccine using genetically modified Salmonella safely prevents and reverses Type 1 diabetes (T1D) in mice. This live attenuated Salmonella vaccine shows promise for treating autoimmune diseases.
Area of Science:
- Immunology
- Microbiology
- Endocrinology
Background:
- Type 1 diabetes (T1D) is an autoimmune disease with no cure.
- Current treatments manage blood glucose but do not halt disease progression.
- Developing effective T1D therapies remains a significant challenge.
Purpose of the Study:
- To evaluate a live, attenuated Salmonella vaccine for Type 1 diabetes treatment.
- To explore the potential of Salmonella-Pathogenicity Island 2 (SPI2)-encoded Type Three Secretion System (T3SS) for autoantigen delivery.
- To assess the efficacy of this vaccine in preventing and reversing autoimmune diabetes.
Main Methods:
- Genetically modified, attenuated Salmonella utilizing SPI2-T3SS were engineered to deliver diabetic autoantigens.
- The vaccine was administered orally to non-obese diabetic (NOD) mice.
- Immune responses, including antigen-specific regulatory T-cells, were analyzed.
- Prevention and reversal of autoimmune diabetes were assessed in preclinical studies.
Main Results:
- The Salmonella-based vaccine demonstrated efficacy in preventing and reversing autoimmune diabetes in NOD mice.
- The SPI2-T3SS facilitated the delivery of autoantigens and immunomodulators.
- The vaccine induced antigen-specific regulatory T-cells, crucial for immune tolerance.
- No adverse effects were observed in the preclinical models.
Conclusions:
- An oral T1D vaccine using live, attenuated Salmonella is a promising therapeutic strategy.
- This platform effectively prevents and reverses autoimmune diabetes by inducing regulatory T-cells.
- Further research could extend this approach to other autoimmune diseases.
Keywords:
SPI2-T3SS of Salmonellacombination therapyimmunomodulatororal vaccine for T1Dsalmonella-based vaccinetoleranceMore Related Videos
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