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Our Current Research

Model Organisms

The Model Organisms Screening Center (MOSC) for the Undiagnosed Diseases Network (UDN) is composed of two Centers that use fruit fly (Drosophila melanogaster), nematode worm (Caenorhabditis elegans) and zebrafish (Danio rerio) genetics and biology to tackle rare and undiagnosed diseases.

Genes of interest

PRDM16 PIK3CD MED13L BSN MED14 MARS1

Meet Our Participants


After a premature and complicated birth, the participant spent 3 weeks in the NICU recovering from breathing and feeding difficulties as well as sepsis. Early on, the participant had some difficulty with fine motor skills and speech delay. He learned to walk at 17 months, but his knees would hyperextend … read more

During the first few months of life, the patient was developing normally. At 1 year old, she started to walk, but would fall frequently. An MRI at this time was normal, but it was recommended that she start physical therapy. She improved significantly with physical therapy and was jumping and … read more

The participant was delivered via C-section after an uncomplicated twin pregnancy and was healthy at birth. She was slow to begin breast-feeding compared to her twin brother. She was notably irritable and “floppy” due to low muscle tone (hypotonia) and had difficulty gaining weight as a newborn. At 5 months … read more

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