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The effect of bone marrow microenvironment on the functional properties of the therapeutic bone marrow-derived cells in patients with acute myocardial infarction
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The effect of bone marrow microenvironment on the functional properties of the therapeutic bone marrow-derived cells in patients with acute myocardial infarction
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Journal Article
The effect of bone marrow microenvironment on the functional properties of the therapeutic bone marrow-derived cells in patients with acute myocardial infarction
2012
Overview
Background
Treatment of acute myocardial infarction with stem cell transplantation has achieved beneficial effects in many clinical trials. The bone marrow microenvironment of ST-elevation myocardial infarction (STEMI) patients has never been studied even though myocardial infarction is known to cause an imbalance in the acid-base status of these patients. The aim of this study was to assess if the blood gas levels in the bone marrow of STEMI patients affect the characteristics of the bone marrow cells (BMCs) and, furthermore, do they influence the change in cardiac function after autologous BMC transplantation. The arterial, venous and bone marrow blood gas concentrations were also compared.
Methods
Blood gas analysis of the bone marrow aspirate and peripheral blood was performed for 27 STEMI patients receiving autologous stem cell therapy after percutaneous coronary intervention. Cells from the bone marrow aspirate were further cultured and the bone marrow mesenchymal stem cell (MSC) proliferation rate was determined by MTT assay and the MSC osteogenic differentiation capacity by alkaline phosphatase (ALP) activity assay. All the patients underwent a 2D-echocardiography at baseline and 4 months after STEMI.
Results
As expected, the levels of pO
2
, pCO
2
, base excess and HCO
3
were similar in venous blood and bone marrow. Surprisingly, bone marrow showed significantly lower pH and Na
+
and elevated K
+
levels compared to arterial and venous blood. There was a positive correlation between the bone marrow pCO
2
and HCO
3
levels and MSC osteogenic differentiation capacity. In contrast, bone marrow pCO
2
and HCO
3
levels displayed a negative correlation with the proliferation rate of MSCs. Patients with the HCO
3
level below the median value exhibited a more marked change in LVEF after BMC treatment than patients with HCO
3
level above the median (11.13 ± 8.07% vs. 2.67 ± 11.89%, P = 0.014).
Conclusions
Low bone marrow pCO
2
and HCO
3
levels may represent the optimal environment for BMCs in terms of their efficacy in autologous stem cell therapy in STEMI patients.
Publisher
BioMed Central,Springer Nature B.V,BMC
Subject
/ Aged
/ Biomedical and Life Sciences
/ Bone Marrow Cells - chemistry
/ Bone Marrow Cells - metabolism
/ Bone Marrow Cells - pathology
/ Bone Marrow Cells - physiology
/ Bone Marrow Transplantation - physiology
/ Cellular Microenvironment - physiology
/ Female
/ Humans
/ Male
/ Myocardial Infarction - diagnosis
/ Myocardial Infarction - pathology
/ Myocardial Infarction - physiopathology
/ Myocardial Infarction - therapy
/ Studies
