scholarly journals Growth Factor Content in Human Sera Affects the Isolation of Mesangiogenic Progenitor Cells (MPCs) from Human Bone Marrow

Author(s):  
Marina Montali ◽  
Serena Barachini ◽  
Francesca M. Panvini ◽  
Vittoria Carnicelli ◽  
Franca Fulceri ◽  
...  
1999 ◽  
Vol 8 (2) ◽  
pp. 189-198 ◽  
Author(s):  
Robert E. Pyatt ◽  
Laura L. Jenski ◽  
Ruth Allen ◽  
Ken Cornetta ◽  
Rafat Abonour ◽  
...  

2012 ◽  
Vol 7 (6) ◽  
pp. 757-767 ◽  
Author(s):  
Sarah L Boddy ◽  
Wei Chen ◽  
Ricardo Romero-Guevara ◽  
Lucksy Kottam ◽  
Illaria Bellantuono ◽  
...  

2006 ◽  
Vol 34 (10) ◽  
pp. 1353-1359 ◽  
Author(s):  
Raquel Gonçalves ◽  
Cláudia Lobato da Silva ◽  
Joaquim M.S. Cabral ◽  
Esmail D. Zanjani ◽  
Graça Almeida-Porada

1992 ◽  
Vol 30 (4) ◽  
pp. 559-560
Author(s):  
R. DE BOCK ◽  
D. VAN BOCKSTAELE ◽  
H. SNOECK ◽  
F. LARDON ◽  
M. PEETERMANS

1988 ◽  
Vol 54 (4) ◽  
pp. 593-600 ◽  
Author(s):  
A. Petkau ◽  
M.D. Sargent ◽  
W.S. Chelack ◽  
J.M. Gerrard

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Winston Y. Cheung ◽  
Owen Hovey ◽  
Jonathan M. Gobin ◽  
Gauri Muradia ◽  
Jelica Mehic ◽  
...  

Background. Human mesenchymal stromal/stem cells (hMSCs) hold great therapeutic potential due to their immunomodulatory and tissue regenerative properties. Enhancement of biological features of hMSCs by transfection has become a focus of investigation for cell- and gene-based therapies. However, many of the current transient transfection methods result in either low transfection efficiency or high cytotoxicity. Methods. In order to find a transfection method that would address the current issues of low transfection efficiency and high cytotoxicity, 6 commercially available cationic lipid and polymer reagents were tested on human bone marrow-derived MSCs (hBM-MSCs) using GFP as a reporter gene. One transfection method using TransIT-2020 was selected and tested with an emphasis on cell quality (viability, identity, and yield), as well as efficacy with a human placental growth factor (PlGF) plasmid. Results. TransIT-2020 yielded the highest fluorescence signal per cell out of the methods that did not decrease cell recovery. Transfecting GFP to 5 hBM-MSC donors using TransIT-2020 yielded 24–36% GFP-expressing cells with a viability of 85–96%. hBM-MSC identity was unaffected as CD90, CD105, and CD73 markers were retained (>95%+) after transfection. When this method was applied to PlGF expression, there was up to a 220-fold increase in secretion. Both growth and secretion of PlGF in overexpressing hBM-MSC were sustained over 7 days, confirming the sustainability and applicability of the TransIT-2020 transfection system. Discussion. We report a simple and efficient method for transient transfection that has not been reported for hBM-MSCs, encompassing high levels of plasmid expression without significant changes to fundamental hBM-MSC characteristics.


Blood ◽  
2000 ◽  
Vol 95 (2) ◽  
pp. 510-518 ◽  
Author(s):  
June Helen Myklebust ◽  
Erlend B. Smeland ◽  
Dag Josefsen ◽  
Mouldy Sioud

Protein kinase C (PKC) is a family of serine/threonine protein kinases involved in many cellular responses. Although the analysis of PKC activity in many systems has provided crucial insights to its biologic function, the precise role of different isoforms on the differentiation of normal hematopoietic progenitor cells into the various lineages remains to be investigated. The authors have assessed the state of activation and protein expression of PKC isoforms after cytokine stimulation of CD34+ progenitor cells from human bone marrow. Freshly isolated CD34+ cells were found to express PKC-, PKC-β2, and PKC-ɛ, whereas PKC-δ, PKC-γ, and PKC-ζ were not detected. Treatment with erythropoietin (EPO) or with EPO and stem cell factor (SCF) induced a predominantly erythroid differentiation of CD34+ cells that was accompanied by the up-regulation of PKC- and PKC-β2 protein levels (11.8- and 2.5-fold, respectively) compared with cells cultured in medium. Stimulation with EPO also resulted in the nuclear translocation of PKC- and PKC-β2 isoforms. Notably, none of the PKC isoforms tested were detectable in CD34+ cells induced to myeloid differentiation by G-CSF and SCF stimulation. The PKC inhibitors staurosporine and calphostin C prevented EPO-induced erythroid differentiation. Down-regulation of the PKC-, PKC-β2, and PKC-ɛ expression by TPA pretreatment, or the down-regulation of PKC- with a specific ribozyme, also inhibited the EPO-induced erythroid differentiation of CD34+ cells. No effect was seen with PKC-β2–specific ribozymes. Taken together, these findings point to a novel role for the PKC- isoform in mediating EPO-induced erythroid differentiation of the CD34+ progenitor cells from human bone marrow.


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