The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Behavior of deformed dermal fibroblasts seeded on a silicon membrane under high levels of strain
Author:	Osorno, Laura
View Online:	njit-etd2015-080 (xii, 60 pages ~ 2.7 MB pdf)
Department:	Department of Biomedical Engineering
Degree:	Master of Science
Program:	Biomedical Engineering
Document Type:	Thesis
Advisory Committee:	Jaffe, Michael (Committee chair) Pfister, Bryan J. (Committee member) Arinzeh, Treena Livingston (Committee member) Michniak, Bozena B. (Committee member) Richardson, Norman K. (Committee member)
Date:	2015-05
Keywords:	Human dermal fibroblasts Morphological abnormalities Functional abnormalities
Availability:	Unrestricted
Abstract:	The main objective of this thesis is to understand, from a molecular perspective, the morphological and functional abnormalities of human dermal fibroblasts as a response to deformation produced by a normal force that can lead to the potential formation of stretch marks in pregnant women, adolescents, and people with Cushing's syndrome. The main function of dermal fibroblasts is to produce the essential fibrous components of the extracellular matrix (ECM) of the skin. In order to study the mechanism of stretch mark formation, neonatal human dermal fibroblasts were seeded on a silicon membrane for controlled deformation. Upon reaching a confluence of 40-70%, they were multi-axially stretched using a device designed specifically for this thesis. A total of three samples were analyzed; two samples were exposed to 20% static strain for a time period of one hour and one sample for 24 hours. The cells presented severe morphological changes after stretching the membrane. They acquired a rounded morphology with unclear cytoplasm and nucleus. Also, the cells started to move throughout the membrane. It has been shown that dermal fibroblasts show significant morphological changes when subjected to deformation. The observed changes are a result of total strain. Future experiments will focus on improving the device for longer periods of cell deformation and for protein synthesis.