|
|
Targeted differentiation and transdifferentiation of stem cells and their therapeutic application
Chudíčková, Milada ; Holáň, Vladimír (advisor) ; Bernášková, Klára (referee) ; Hrdý, Jiří (referee)
Mesenchymal stem cells (MSCs) naturally differentiate into cells of tissues of mesodermal lineage: cartilage, bone or adipose tissue. As a result of specific environmental stimuli, MSC are able to transdifferentiate into cells of endodermal or ectodermal lineage. Also, MSCs are able to regulate the inflammatory processes and to support healing and regeneration. These properties make MSCs suitable in cell-based therapy and tissue engineering. Characteristics of MSCs (for example differentiation and proliferative potential and cytokine secretion profile) can vary slightly depending on their origin. These differences can be further amplified by the effects of specific environments. Thus, to obtain maximal benefit, it is important to select MSCs optimal for a particular environment. The main goal of this thesis was to design in vitro protocol for transdifferentiation of MSCs into neuron-like cells. For this application, the adipose tissue-derived MSCs seemed to be optimal, due to their higher production of basic fibroblast growth factor, one of the important factors in neural development. The resulting cells acquired typical neuron-like morphology, expressed genes for neuron-specific markers and produced neuron-specific proteins. Further, the resulting cells showed immunomodulatory properties similar...
|
|
|
The role of extracellular matrix in mesenchymal stem cell biology
Šimková, Zuzana ; Chudíčková, Milada (advisor) ; Hubálek Kalbáčová, Marie (referee)
The aim of this bachelor thesis is to describe the mutual relations of mesenchymal stem cells and extracellular matrix, their communication and to point out their significance in living body. First part is focused on description of extracellular matrix, its components and characteristics. The interaction between extracellular matrix and surrounding cells is using both receptors and enzymes. Second part addresses the description of mesenchymal stem cells which are crucial producers of extracellular matrix. The matrix is also decisive part of stem cells niche which envelopes them, protects them and decides their future. The last section demonstrates possible utilizations of differentiation potential and paracrine secretion of MSC in therapy and identifies some of the risks bound to it.
|
|
|
Effect of Wharton's jelly-derived mesenchymal stem cells secretome in the treatment of rat spinal cord injury
Jančová, Pavlína ; Chudíčková, Milada (advisor) ; Grobárová, Valéria (referee)
As previously shown, transplantation of Wharton's jelly-derived mesenchymal stem cells in the experimental model of spinal cord injury leads to the motor and sensory functions improvement, supports neuroregeneration, angiogenesis and provides immunomodulation. On the other hand, these cells have limited migration and survival capacity, and their therapeutic effect is mediated mostly by their secretome. Therefore, application of mesenchymal stem cells derived conditioned medium is studied as an alternative option for cell therapy. In this thesis, therapeutic effect of repeated intrathecal delivery of human Wharton's jelly-derived mesenchymal stem cells and their conditioned media in the treatment of spinal cord injury was compared. After induction of a balloon ischemic compression lesion, stem cells or conditioned media were administered weekly in three doses. Behavioral analyses were carried out up to nine weeks after spinal cord injury and revealed significant improvement of both treated groups compared to the untreated saline control. Application of stem cells and conditioned media also resulted in a higher amount of spared tissue and enhanced expression of genes related to neuroregeneration, although the size of glial scar was not reduced. Compared to application of stem cells, application of...
|
|
|
Targeted differentiation and transdifferentiation of stem cells and their therapeutic application
Chudíčková, Milada ; Holáň, Vladimír (advisor) ; Bernášková, Klára (referee) ; Hrdý, Jiří (referee)
Mesenchymal stem cells (MSCs) naturally differentiate into cells of tissues of mesodermal lineage: cartilage, bone or adipose tissue. As a result of specific environmental stimuli, MSC are able to transdifferentiate into cells of endodermal or ectodermal lineage. Also, MSCs are able to regulate the inflammatory processes and to support healing and regeneration. These properties make MSCs suitable in cell-based therapy and tissue engineering. Characteristics of MSCs (for example differentiation and proliferative potential and cytokine secretion profile) can vary slightly depending on their origin. These differences can be further amplified by the effects of specific environments. Thus, to obtain maximal benefit, it is important to select MSCs optimal for a particular environment. The main goal of this thesis was to design in vitro protocol for transdifferentiation of MSCs into neuron-like cells. For this application, the adipose tissue-derived MSCs seemed to be optimal, due to their higher production of basic fibroblast growth factor, one of the important factors in neural development. The resulting cells acquired typical neuron-like morphology, expressed genes for neuron-specific markers and produced neuron-specific proteins. Further, the resulting cells showed immunomodulatory properties similar...
|
|
|
Changes in expression of immune-related genes after induction of inflammation in birds
Pojezdná, Anežka ; Vinkler, Michal (advisor) ; Chudíčková, Milada (referee)
Inflammation is one of the most important immunological mechanisms that protect animals from diseases. In my thesis I summarized information on changes in gene expression in tissues in the course of the inflammatory immune response in birds. I tried to describe the main features of the immune response in birds and highlight the differences to other vertebrates, especially mammals. I focused mainly on the surface molecules of various types of immune cells, as well as on signalling by soluble factors called cytokines. Although in general features are the inflammatory reactions in birds and mammals similar, in my thesis I have shown that a large portion of mediators and signalling molecules work very differently in these two vertebrate groups (e. g. the TNF SF-mediated pro-inflammatory signalling) and that substantial variation many be found even between different species of birds. Powered by TCPDF (www.tcpdf.org)
|
guest ::
RSS feed.