Towards Cell-based therapies for diabetes: Characterisation
of the effects of hyperglycemia on proliferation, immune
phenotype and differentiation potential of adipose tissue-
derived mesenchymal stromal cells
Table of Contents
1. Introduction
2. Project Rationale
3. Methods
3.1 Isolation and expansion of MSCs
3.2 Isolation and expansion of HUVECs
3.3 Adipogenic differentiation of MSCs
3.4 Oil red staining for adipogenesis assay
3.5 Osteogenic differentiation of MSCs
3.6 ODA staining for osteogenesis assay
3.7 Immunofluorescence in HUVE cells
3.8 Matrigel assay for HUVECs
4. Experimental design
5. Results
5.1 Observation and data analysis for the Immunofluorescence in ADA and ODA MSCs
5.2 ADA&ODA stainings
5.3 TECAN measurement and analysis
5.4 Control IF microscopy
5.5 vWF in HUVECs
5.6 FACS on HUVECs
Research Objectives & Themes
This report documents two pilot projects aimed at characterizing the effects of environmental stressors, specifically hypoxia and hyperglycemia, on the proliferation, immune phenotype, and differentiation potential of mesenchymal stromal cells (MSCs) and human umbilical vein endothelial cells (HUVECs).
- Evaluation of glucose concentration effects on HUVECs and ECFCs in vitro.
- Comparative analysis of MSCs derived from adipose tissue (LA) and bone marrow (BM) under stress conditions.
- Characterization of adipogenic and osteogenic differentiation potential in MSCs.
- Analysis of endothelial cell tube formation under varying oxygen and glucose levels.
- Immunofluorescence and flow cytometry (FACS) profiling of cell markers and cellular distributions.
Extract from the Lab Report
Osteogenic differentiation of MSCs
One of the most noteworthy characteristics of mesenchymal stem cells (MSCs) is their ability to differentiate into osteoblasts in vitro and in vivo. In vitro, this is easily achieved by culturing in the appropriate induction medium. It is because of the reliability and ease of this process that osteogenic differentiation has become a popular assay for the demonstration of MSC plasticity. The cells were cultured in MSC growth medium (MSCGM; the cell system components consisted of the MSC basal medium and the SingleQuots growth supplements MCGS, which contained fetal bovine serum (FBS), L-glutamine and penicillin/streptomycin in a humidified incubator in the presence of 95% air and 5% CO2 at 37C. After 24 h, the media was changed to MSC osteogenic induction medium (MSCOIM; the cell system components consisted of MSC basal medium that contained FBS, L-glutamine, penicillin/streptomycin, dexamethasone, ascorbate, and -glycerophosphate. The media was changed twice a week.
Summary of Chapters
Introduction: Provides the scientific background on human mesenchymal stem cells, their origins in bone marrow and other tissues, and their clinical potential in regenerative medicine.
Project Rationale: Outlines the core objectives of the pilot projects, focusing on evaluating the effects of environmental factors like glucose and oxygen levels on HUVECs and MSCs.
Methods: Describes the technical protocols for cell isolation, expansion, and specific differentiation and staining assays performed during the study.
Experimental design: Details the rationale behind the selected culture conditions, including the modulation of glucose and oxygen concentrations to simulate diabetic and hypoxic environments.
Results: Presents the findings from immunofluorescence, TECAN measurements, and FACS analysis, including statistical validations and phenotypic observations.
Keywords
Mesenchymal stromal cells, HUVECs, Hypoxia, Hyperglycemia, Adipogenic differentiation, Osteogenic differentiation, Immunofluorescence, FACS, Cell proliferation, Tube formation assay, Regenerative medicine, Glucose overload, Cell markers, In vitro study, Laboratory report
Frequently Asked Questions
What is the primary focus of this laboratory report?
The report details the experimental procedures and results of two pilot projects investigating how hypoxia and hyperglycemia affect mesenchymal stromal cells and endothelial cells.
What are the central research themes?
The research explores cell plasticity, differentiation potential (adipogenic and osteogenic), and the impact of external stress factors on cell growth and phenotype.
What is the main research objective?
The goal is to determine the phenotypic changes and differentiation rates of MSCs and HUVECs when exposed to varied glucose concentrations and partial oxygen pressures.
Which scientific methods are utilized in this work?
Methods include cell culture expansion, specialized induction media for differentiation, Oil Red and ODA staining, immunofluorescence microscopy, and flow cytometry (FACS).
What topics are covered in the main body?
The body covers comprehensive experimental designs, detailed protocols for cell staining and analysis, and the presentation of raw and processed quantitative data.
Which keywords characterize this report?
Key terms include MSCs, HUVECs, Hypoxia, Hyperglycemia, differentiation, and immunofluorescence.
How were the effects of hyperglycemia simulated in this experiment?
Hyperglycemia was simulated by using a high glucose concentration (4g/L), which is 10-15 times higher than physiological levels, to induce a clear response over a 2-3 week period.
Why was normalization against DNA content necessary?
Normalization was performed to account for the interplay between cell proliferation rates and differentiation potential, ensuring that results were not skewed by cell density variations.
What was observed in the HUVEC tube formation assay?
Results indicated that HUVECs cultured under hypoxic conditions showed a reduced degree of tube formation on Matrigel and Geltrex compared to those under normoxic conditions.
- Quote paper
- Kliment Sandjakoski (Author), 2014, Characterisation of the effects of hypoxia on proliferation, immune phenotype and differentiation potential of adipose tissue-derived, bone-marrow derived mesenchymal stromal cells and HUVECs, Munich, GRIN Verlag, https://www.grin.com/document/286823
