Sorenson Research Group

The retina and the kidney share many developmental and disease-related abnormalities. Modulation of apoptosis is critical during development. Bcl-2 protects cells from apoptosis while Bim expression facilitates this process. The current focus of our laboratory is to understand the role apoptotic processes play in retinal and kidney vascular development and how they are aberrantly regulated during disease. Our ability to examine abnormalities in both organs, in parallel, enhances the design of appropriate treatment modalities for retinal or renal disease without compromising renal or retinal function.

Collagen IV staining to visualize the mouse retinal vasculature.
Collagen IV staining to visualize the mouse retinal vasculature.

Apoptosis plays an important role during formation of the vascular network and pathological neovascularization. However, the physiological role Bcl-2 family members play during these processes requires further delineation. Mice deficient in Bcl-2 develop renal hypoplasia/cystic dysplasia. Renal hypoplasia/dysplasia/aplasia are the second leading cause of renal transplantation in children and is commonly lethal. More recently our research has focused on the role bcl-2 family members play during postnatal retinal vascularization and retinal and choroidal neovascularization (CNV), as occurs in retinopathy of prematurity (ROP) and age-related macular degeneration (AMD). Both ROP and AMD are major causes of blindness in the United States and the underlying mechanisms remain poorly understood.

The research in our laboratory exploits our unique ability to study both retinal and renal developmental changes and isolate vascular and non-vascular cells from transgenic mice to study in tandem. Our novel research has demonstrated that expression of Bcl-2 family member proteins not only impacts cell death but also many other cell specific functions.  The ability of pro- and anti-apoptotic proteins to influence these cell functions could have implications during development and disease. Alterations in cellular functions may lead to abnormal retinal and kidney development and various disease states. The knowledge gained from our studies will allow us to better understand the regulatory mechanisms in these organs and their alteration with various pathologies will aid the design of treatment modalities to intervene at earlier stages of disease preventing their development and progression with no or limited off target effects.

Current Projects

  1. Determine the role Bcl-2 plays during choroidal and retinal neovascularization.
  2. Determine the role Bim expression plays during postnatal retinal vascular development and remodeling.
  3. Determine whether Bim expression is critical for hyperoxia-mediated retinal vessel obliteration.
  4. Determine the protective role of Bcl-2 in lungs during hyperoxia-induced damage due to oxidative stress.

Lab News

  • What We Published In May 2020

    Al Dhaheri N, Wu N, Zhao S, Wu Z, Blank RD, Zhang J, Raggio C, Halanski M, Shen J, Noonan K, Qiu G, Nemeth B, Sund S, Dunwoodie SL, Chapman G, Glurich I, Steiner RD, Wohler …

  • Pediatrics Research Week 2020 Abstract Book Now Available

    The Pediatrics Research Week 2020 Abstract Book is now available. University of Wisconsin Department of Pediatrics faculty, staff, fellows and residents submitted over 50 research abstracts for the virtual conference, which is taking place May 26-29, 2020. …

  • What We Published in April 2020

    1. Ascierto PA, Fox B, Urba W, Anderson AC, Atkins MB, Borden EC, Brahmer J, Butterfield LH, Cesano A, Chen D, de Gruijl T, Dillman RO, Drake CG, Emens LA, Gajewski TF, Gulley JL, Stephen …

  • Save the Date: Virtual Pediatrics Research Week Begins 5/26/20

    In response to COVID-19, the Department of Pediatrics’ annual Research Week will offer alternative programming to spotlight the scholarly work from its residents, fellows, faculty and staff. Through a mix of livestreamed lectures and interactive …

  • What We Published in March 2020

    Coller RJ, Berry JG, Kuo DZ, Kuhlthau K, Chung PJ, Perrin JM, Hoover CG,Warner G, Shelton C, Thompson LR, Garrity B, Stille CJ. Health System Research Priorities for Children and Youth With Special Health Care …

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Chris Sorenson, PhD
Christine M. Sorenson, PhD
Distinguished Scientist

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