Back to Search
Start Over
Reversible secretome and signaling defects in diabetic mesenchymal stem cells from peripheral arterial disease patients.
- Source :
-
Journal of vascular surgery [J Vasc Surg] 2018 Dec; Vol. 68 (6S), pp. 137S-151S.e2. Date of Electronic Publication: 2018 Aug 10. - Publication Year :
- 2018
-
Abstract
- Objective: Regenerative medicine seeks to stall or to reverse the pathologic consequences of chronic diseases. Many people with diabetes have peripheral arterial disease (PAD), which increases their already high risk of major amputation. Cellular therapies are a promising regenerative medicine approach to PAD that can be used to focally inject regenerative cells to endangered tissue beds. Mesenchymal stem cells (MSCs) are known to promote tissue regeneration through stromal support and paracrine stimulation of new blood vessels (angiogenesis). Whereas little is known about human diabetic MSCs (dMSCs), particularly those from patients with PAD, dMSCs have a limited expansion capacity but can be improved with human platelet lysate (PL) supplementation. PL is rich in many growth factors, including epidermal growth factor (EGF), which is known to be important to cell proliferation and survival signaling pathways. We hypothesize that dMSCs have a reversible defect in EGF receptor pathways. The objective of this work was to test this hypothesis using dMSCs from PAD patients.<br />Methods: The secretome expression of EGF and prominent angiogens was characterized from bone marrow (BM)-derived and adipose tissue-derived (ATD) dMSCs from five patients (six limbs) undergoing major amputation. Western blot was used to characterize the AKT and extracellular signal-regulated protein kinases 1 and 2 expression in dMSCs under standard culture (5% fetal bovine serum plus fibroblast growth factor 2 [FGF2]), 5% human PL, or 5% fetal bovine serum plus EGF. Healthy donor MSCs were control cells. The angiogenic activity of BM- and ATD-dMSCs was tested on human umbilical vein endothelial cells (ECs). Paired t-test, analysis of variance, and Kruskal-Wallis tests were used as appropriate.<br />Results: Both BM- and ATD-dMSCs had typical MSC surface marker expression and similar expansion profiles, and they did not express EGF in their secretome. PL supplementation of dMSCs improved AKT signaling, but they were resistant to FGF2 activation of extracellular signal-regulated protein kinases 1 and 2. EGF supplementation led to similar AKT expression as with PL, but PL had greater phosphorylation of AKT at 30 and 60 minutes. The conditioned media from both BM- and ATD-dMSCs had robust levels of prominent angiogens (vascular endothelial growth factor, monocyte chemoattractant protein 1, hepatocyte growth factor), which stimulated EC proliferation and migration, and the co-culture of dMSCs with ECs led to significantly longer EC sprouts in three-dimensional gel than EC-alone pellets.<br />Conclusions: PL and EGF supplementation improves AKT expression in dMSCs over that of FGF2, but PL improved pAKT over that of EGF. Thus, PL supplementation strategies may improve AKT signaling, which could be important to MSC survival in cellular therapies. Furthermore, BM- and ATD-dMSCs have similar secretomes and robust in vitro angiogenic activity, which supports pursuing dMSCs from both reservoirs in regenerative medicine strategies.<br /> (Copyright © 2018 Society for Vascular Surgery. Published by Elsevier Inc. All rights reserved.)
- Subjects :
- Aged
Amputation, Surgical
Blood Platelets metabolism
Bone Marrow Cells drug effects
Bone Marrow Cells pathology
Cell Extracts pharmacology
Cell Movement
Cell Proliferation
Cell Survival
Cells, Cultured
Diabetic Angiopathies pathology
Diabetic Angiopathies surgery
Epidermal Growth Factor pharmacology
Female
Fibroblast Growth Factor 2 pharmacology
Human Umbilical Vein Endothelial Cells metabolism
Humans
Male
Mesenchymal Stem Cells drug effects
Mesenchymal Stem Cells pathology
Middle Aged
Peripheral Arterial Disease pathology
Peripheral Arterial Disease surgery
Phenotype
Phosphorylation
Proto-Oncogene Proteins c-akt metabolism
Secretory Pathway
Adipose Tissue cytology
Bone Marrow Cells metabolism
Diabetic Angiopathies metabolism
Mesenchymal Stem Cells metabolism
Neovascularization, Physiologic
Peripheral Arterial Disease metabolism
Signal Transduction
Subjects
Details
- Language :
- English
- ISSN :
- 1097-6809
- Volume :
- 68
- Issue :
- 6S
- Database :
- MEDLINE
- Journal :
- Journal of vascular surgery
- Publication Type :
- Academic Journal
- Accession number :
- 30104096
- Full Text :
- https://doi.org/10.1016/j.jvs.2018.05.223