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Peptide Immunizations Lower Diabetic Incidence In Animal Model.(Brief Article)

Vaccine Weekly

| October 03, 2001 | COPYRIGHT 2001 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2001 OCT 3 - (NewsRx.com & NewsRx.net) --

by Sonia Nichols, senior medical writer - Stanford University researchers in California have developed a DNA vaccine that prevents animals from developing insulin-dependent diabetes mellitus (IDDM).

The vaccine, comprising insulin peptide particles, exploits immune response mechanisms before autoimmune factors can affect insulin production in nonobese diabetic mice (NOD), I. Urbanek-Ruiz and colleagues reported in Clinical Immunology.

"IDDM is an autoimmune disease characterized by T-cell mediated destruction of the insulin-secreting beta cells in the pancreas," Urbanek-Ruiz and coworkers explained.

Using genetic material encoding for peptide residues 9 through 23 from the beta chain of insulin, the group developed a DNA vaccine that proved effective when inoculated into NOD mice, normally used for modeling IDDM.

"Animals injected intramuscularly with a bacterial plasmid encoding the insulin B chain peptide show significantly lower disease incidence and delayed onset of disease when compared to controls," investigators stated.

Further vaccine development might prove fruitful for preventing or limiting T-cell mediated ...

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