In a separate project funded through the Friends of Prentice Foundation, the Dizon lab has documented perturbations in specific microRNAs known regulate white matter development following hypoxia-ischemia.
Through the generous support of these sponsors as well as the support of bridge funding from the Stanley Manne Research Center, Dr. Dizon has established an independent research program. Going forward, the central interest of Dr. Dizon’s lab continues to be whether neural injury induces changes in neural stem and progenitor cell lineages; that is, do cells that would ordinarily become one type of cell change to become a different cell type in order to meet a need following injury? This interest has resulted in an important new collaboration with Ed Gong, MD, Assistant Professor, Pediatric Urology. Together, the two labs will be studying changes to stem cell lineages following bladder denervation after spinal cord injury. This will involve the use of new mouse models the labs are developing together with the Transgenic and Targeted Mutagenesis Laboratory at Northwestern Feinberg School of Medicine. The hope here is to develop translational strategies to restore function to the bladder in patients with spinal cord injuries.
Persistent Pulmonary Hypertension Research
Persistent pulmonary hypertension (PPHN) is a serious clinical disorder that occurs in some newborn infants when the blood vessels in the lung do not adjust normally during the transition to breathing air at birth.
Although inhaled nitric oxide (NO) helps many newborns with PPHN, a substantial number of infants do not respond initially to this treatment, or do not continue responding. In addition, pulmonary hypertension may worsen considerably when NO is discontinued after as little as 24 hours of inhalation.
Researchers are only beginning to understand how and why NO works. Because NO is a potent oxidant that may damage the lung, it appears to work through increasing concentrations of a messenger molecule called cyclic GMP in the smooth muscle cell.
Scientists at Lurie Children's are examining whether the formation and breakdown of this messenger molecule occurs normally in PPHN. They are also evaluating the role of other oxidants in producing or aggravating PPHN and if they interact with NO.
The researchers' ultimate goal is to develop new therapies that safely work with NO, thereby allowing the blood vessels of the lung to relax more normally.