FAK Deficiency in Bone Marrow Stromal Cells Alters Their Homeostasis and Drives Abnormal Proliferation and Differentiation of Haematopoietic Stem Cells.

Cells
Yuenv WuCarmen-Mariana Aanei

Abstract

Emerging evidence indicates that in myelodysplastic syndromes (MDS), the bone marrow (BM) microenvironment may also contribute to the ineffective, malignant haematopoiesis in addition to the intrinsic abnormalities of haematopoietic stem precursor cells (HSPCs). The BM microenvironment influences malignant haematopoiesis through indirect mechanisms, but the processes by which the BM microenvironment directly contributes to MDS initiation and progression have not yet been elucidated. Our previous data showed that BM-derived stromal cells (BMSCs) from MDS patients have an abnormal expression of focal adhesion kinase (FAK). In this study, we characterise the morpho-phenotypic features and the functional alterations of BMSCs from MDS patients and in FAK knock-downed HS-5 cells. The decreased expression of FAK or its phosphorylated form in BMSCs from low-risk (LR) MDS directly correlates with BMSCs' functional deficiency and is associated with a reduced level of haemoglobin. The downregulation of FAK in HS-5 cells alters their morphology, proliferation, and differentiation capabilities and impairs the expression of several adhesion molecules. In addition, we examine the CD34+ healthy donor (HD)-derived HSPCs' properties when co-cult...Continue Reading

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Citations

Aug 14, 2021·Cardiovascular Research·Doris A TaylorUNKNOWN Cardiovascular Cell Therapy Research Network (CCTRN)

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Methods Mentioned

BETA
MDS
flow cytometry
FACS
Assay
FCS
PCR

Clinical Trials Mentioned

NCT03233074

Software Mentioned

FACSDiva
Excel
Image J
Infinicyt
Adobe Photoshop CC
FlowJo
Prism
ImageJ
TreeStar
GraphPad

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