Faculty

Facilities

Research Centers

Faculty Areas of Thesis Guidance

 
   
  James Dunn, M.D., Ph.D.
 
 
 

Associate Professor
Department of Bioengineering
Department of Surgery, Division of Pediatric Surgery

Bioengineering Office: 4121J Engineering V
Surgery Office: CHS 72-172
jdunn@mednet.ucla.edu

 

California Institute of Technology, B.S.
Massachusetts Institute of Technology, Ph.D.
Harvard Medical School, M.D.
 

Research Description

Tissue Engineering of Internal Organs

1. Intestinal Tissue Engineering
2. Adrenal Cortical Stem Cells
3. Mass Transfer in Tissue Engineering
4. Mechanical Forces in Tissue Engineering
5. Intracellular Signaling in Tissue Engineering


Intestinal Tissue Engineering (top of page)

Postdoctoral Fellow:
Jinyoung Park, M.D., pediatric surgeon, Tengu, Korea

Student:
Min Lee, B.S., M.S. in Materials Science and Engineering, Yonsei University, Seoul, Korea, Currently Ph.D. student in Bioengineering

Collaborators:
Prof. Ben Wu, Department of Bioengineering

Short bowel syndrome occurs in children with an inadequate length of intestine to maintain normal digestion and absorption. These children are dependent on intravenous nutrition to sustain normal growth, however, this is associated with significant cost ($100,000 per patient per year) and morbidity, including infection and liver cirrhosis. Although intestinal transplantation for these patients is possible, outcomes are marginal and there are significant side effects associated with life-long immunosuppression. The long-term objective of this project is to engineer functional intestinal tissue that can be used to treat patients with short-bowel syndrome. Specifically, this project will focus on developing a genetically modified intestinal cell that can be grown on a bio-engineered scaffolding and ultimately, implanted into an animal model. The project can be broken down into three specific goals:

1. Developing a genetically-modified intestinal stem cell line.
2. Examining the effect of engineered scaffolds on the functions of these intestinal cells.
3. Following the fate of these intestinal cells after they have been implanted in an animal model. (Funded by UCLA Chancellor’s Border Crossing Initiative, Stein Oppenheimer Award, American Surgical Association Foundation)





Adrenal Cortical Stem Cells (top of page)

Student:
Yinting Chu, B.S., in Molecular Biology, Taiwan University, Taipei, Taiwan, Currently Ph.D. student in Bioengineering
Collaborators:
Prof. Ben Wu, Department of Bioengineering
Prof. Ed McCabe, Department of Pediatrics and Human Genetics
The research project is focused on identifying molecular markers to isolate and transplant adrenal cortical progenitor cells as a potential treatment of adrenal insufficiency. A transgenic mouse that expresses the green fluorescent protein in adrenal cortical cells is used as the animal model. The first specific aim employs two strategies to identify candidate adrenal cortical progenitor cell markers: microarray analysis of adrenal cortical cell lines that differentiate in response to temperature change and screening of known stem cell surface markers during the ontogeny of the adrenal cortex. The second specific aim utilizes flow cytometry to sort primary adrenal cortical cells into subpopulations based on their differential expression of surface receptors. These potential adrenal cortical progenitor cells are transplanted under the renal capsule to determine their regenerative potential. These studies will lead to better understanding of the development of the adrenal cortex, as well as a new therapy to treat adrenal insufficiency in a more physiological fashion.

 

 

   

 

 

 

 

 

 

 

 

 

 

 

 

 

 
 
  420 Westwood Plaza, Room 5121 Engineering V,
PO Box 951600, Los Angeles, California 90095-1600
phone 310.267.4985
fax 310.794.5956