g- or toxin-induced disorders, created a challenge for physicians to diagnose a specific disease.

Therefore, the treatment of affected children was not disease-specific and aimed at optimizing care to help reduce liver transplantation. With the jaundice chip, however, diagnosis can be simplified by surveying the genetic code for mutations in specific diseases.

The jaundice chip was designed as a "five-in-one" gene chip to screen mutations (a permanent change in the DNA sequence that makes up a gene) in five genes using only one milliliter, or less than a half of a teaspoon, of blood.

Gene chips contain several thousand small fragments of DNA on a small piece of glass. Incubation of these chips with the patient's DNA sample produce chemical signals that "glow" and allow for the detection of the normal gene sequence, or of mutations if they are present in the patient.

"The jaundice chip is an extraordinary advance for our patients with liver diseases. It will improve diagnostic accuracy for perplexing diseases in infants and children, potentially decrease the need for invasive and costly studies, and allow us to develop specific treatment plans based on the correct genetic diagnosis," said Dr. Cohen.

"With further genetic testing of liver disease, there is the potential that medications can be tailored to meet the needs of individual patients taking into account the patient's genetic make-up," adds Dr. Bezerra. "For now, the use of the gene chip gives families piece of mind, knowing what their child is living with. The next focus of advances will be the development of medication that may block progression of their disease.

Today, detection of liver diseases with the jaundice chip is continuing, using samples from children worldwide through a research protocol in the division of gastroenterology, hepatology and nutrition at Cincinnati Children's. Once approved by the Food and Drug Administration, the pote
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