Arrest of In Vitro T Cell Differentiation of Normal Bone Marrow‐Derived CD34+Stem Cells with Thymic Epithelial Fragments from Children with AIDS

Stem Cells ◽  
1996 ◽  
Vol 14 (5) ◽  
pp. 533-547 ◽  
Author(s):  
Margaret E. Ruiz ◽  
John Freeman ◽  
John D. Bouhasin ◽  
Alan P. Knutsen ◽  
Mary J. C. Hendrix
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Cell Differentiation ◽  
T Cell ◽  
T Cell Differentiation ◽  
Normal Bone Marrow ◽  
Normal Bone

Radiation Modifying Effect of the Free Radical Norpseudopelletierene-N-Oxyl on Normal Bone Marrow Stem Cells in Vitro and in Vivo

1974 ◽  
Vol 58 (3) ◽  
pp. 361 ◽  
Author(s):  
N. M. Blackett ◽  
W. E. Wooliscroft ◽  
E. M. Fielden ◽  
S. C. Lillicrap
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Free Radical ◽  
Bone Marrow Stem Cells ◽  
Normal Bone Marrow ◽  
Normal Bone ◽  
Modifying Effect

scholarly journals Potential Involvement of BIRC5 in Maintaining Pluripotency and Cell Differentiation of Human Stem Cells

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Paulina Gil-Kulik ◽  
Arkadiusz Krzyżanowski ◽  
Ewa Dudzińska ◽  
Jolanta Karwat ◽  
Piotr Chomik ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Cell Differentiation ◽  
Peripheral Blood ◽  
Survivin Expression ◽  
Regulatory Function ◽  
Normal Bone Marrow ◽  
Human Stem Cells ◽  
Hematopoietic Stem ◽  
Normal Bone

The BIRC5 gene encodes a survivin protein belonging to class III of inhibitors of apoptosis, IAP. This protein serves a dual role. First, it regulates cell death, and second, it is an important regulator of mitosis progression, although its physiological regulatory function has not been fully understood. Many studies have shown and confirmed that survivin is practically absent in mature tissues in nature, while its overexpression has been reported in many cancerous tissues. There is little information about the significance of BIRC5 expression in normal adult human stem cells. This paper presents the study and analysis of survivin expression at the transcription level using qPCR method, in hematopoietic stem cells from peripheral blood mobilized with a granulocyte growth factor, adherent cells derived from the umbilical cord, and normal bone marrow stem cells. The expression of this gene was also examined in the blood of normal healthy individuals. The results of the analysis have shown that the more mature the cells are, the lower the expression of the BIRC5 gene is. The lowest expression has been found in peripheral blood cells, while the highest in normal bone marrow cells. The more the CD34+ and CD105 cells in the tested material are, the higher the BIRC5 expression is. Stem cells from cell culture show higher BIRC5 expression. The study confirms the involvement of BIRC5 from the IAP family in many physiological processes apart from apoptosis inhibition. The possible effect of BIRC5 on cell proliferation; involvement in cell cycle, cell differentiation, survival, and maintenance of stem cells; and the possible effect of IAP on the antineoplastic properties of mesenchymal stem cells have been demonstrated. Our research suggests that BIRC5 may be responsible for the condition of stem cell pluripotency and its high expression may also be responsible for the dedifferentiation of tumor cells.

Induction of T-cell development from human cord blood hematopoietic stem cells by Delta-like 1 in vitro

Blood ◽  
2005 ◽  
Vol 105 (4) ◽  
pp. 1431-1439 ◽  
Author(s):  
Ross N. La Motte-Mohs ◽  
Elaine Herer ◽  
Juan Carlos Zúñiga-Pflücker
Keyword(s):  
Stem Cells ◽  
T Cells ◽  
Cell Differentiation ◽  
T Cell ◽  
Cord Blood ◽  
T Cell Development ◽  
T Cell Differentiation ◽  
Human Cord Blood ◽  
Hematopoietic Stem

AbstractThe Notch signaling pathway plays a key role at several stages of T-lymphocyte differentiation. However, it remained unclear whether signals induced by the Notch ligand Delta-like 1 could support full T-cell differentiation from a defined source of human hematopoietic stem cells (HSCs) in vitro. Here, we show that human cord blood–derived HSCs cultured on Delta-like 1–expressing OP9 stromal cells undergo efficient T-cell lineage commitment and sustained T-cell differentiation. A normal stage-specific program of T-cell development was observed, including the generation of CD4 and CD8 αβ–T-cell receptor (TCR)–bearing cells. Induction of T-cell differentiation was dependent on the expression of Delta-like 1 by the OP9 cells. Stimulation of the in vitro–differentiated T cells by TCR engagement induced the expression of T-cell activation markers and costimulatory receptors. These results establish an efficient in vitro coculture system for the generation of T cells from human HSCs, providing a new avenue for the study of early T-cell differentiation and function.

scholarly journals Analyses of T-cell differentiation from hemopoietic stem cells in the G0 phase by an in vitro method.

1991 ◽  
Vol 88 (17) ◽  
pp. 7548-7551 ◽  
Author(s):  
J. Toki ◽  
T. Kumamoto ◽  
H. Ogata ◽  
M. Kawamura ◽  
M. Fukumoto ◽  
...  
Keyword(s):  
Stem Cells ◽  
Cell Differentiation ◽  
T Cell ◽  
T Cell Differentiation ◽  
Hemopoietic Stem Cells ◽  
In Vitro Method ◽  
G0 Phase

Extrathymic T cell differentiation in vitro from human CD34+ stem cells

1998 ◽  
Vol 64 (6) ◽  
pp. 733-739 ◽  
Author(s):  
Graham Pawelec ◽  
Robert Muller ◽  
Arnika Rehbein ◽  
Karin Hähnel ◽  
Benedikt L. Ziegler
Keyword(s):  
Stem Cells ◽  
Cell Differentiation ◽  
T Cell ◽  
T Cell Differentiation ◽  
Human Cd34

scholarly journals Proliferation and differentiation of highly enriched mouse hematopoietic stem cells and progenitor cells in response to defined growth factors.

1988 ◽  
Vol 167 (6) ◽  
pp. 1825-1840 ◽  
Author(s):  
C E Müller-Sieburg ◽  
K Townsend ◽  
I L Weissman ◽  
D Rennick
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Growth Factors ◽  
Hematopoietic Stem Cells ◽  
Progenitor Cells ◽  
M Cells ◽  
Normal Bone Marrow ◽  
Hematopoietic Stem ◽  
Normal Bone

Three distinct hematopoietic populations derived from normal bone marrow were analyzed for their response to defined growth factors. The Thy-1loT- B- G- M-population, composing 0.2% of bone marrow, is 370-fold enriched for pluripotent hematopoietic stem cells. The two other populations, the Thy-1- T- B- G- M- and the predominantly mature Thy-1+ T+ B+ G+ M+ cells, lack stem cells. Thy-1loT- B- G- M- cells respond with a frequency of one in seven cells to IL-3 in an in vitro CFU-C assay, and give rise to many mixed colonies as expected from an early multipotent or pluripotent progenitor. The Thy-1- T- B- G- M- population also contains progenitor cells which responded to IL-3. However, colonies derived from Thy-1- T- B- G- M- cells are almost exclusively restricted to the macrophage/granulocyte lineages. This indicates that IL-3 can stimulate at least two distinct clonogenic early progenitor cells in normal bone marrow: multipotent Thy-1loT- B- G- M- cells and restricted Thy-1- T- B- G- M- cells. Thy-1loT- B- G- M-cells could not be stimulated by macrophage colony-stimulating factor (M-CSF), granulocyte CSF (G-CSF) or IL-5 (Eosinophil-CSF). The hematopoietic precursors that react to these factors are enriched in the Thy-1- T- G- B- M- population. Thus, multipotent and restricted progenitors can be separated on the basis of the expression of the cell surface antigen Thy-1.

158 Inhibition of PI3Kδ improves tumor specific T cell immunity and metabolic fitness

2020 ◽  
Vol 8 (Suppl 3) ◽  
pp. A172-A172
Author(s):  
Guillermo Rangel Rivera ◽  
Guillermo Rangel RIvera ◽  
Connor Dwyer ◽  
Dimitrios Arhontoulis ◽  
Hannah Knochelmann ◽  
...  
Keyword(s):  
T Cells ◽  
Cell Differentiation ◽  
T Cell ◽  
Cell Therapy ◽  
Tumor Immunity ◽  
Mitochondrial Function ◽  
T Cell Differentiation ◽  
Tumor Control ◽  
T Cell Therapy

BackgroundDurable responses have been observed with adoptive T cell therapy (ACT) in some patients. However, current protocols used to expand T cells often exhibit suboptimal tumor control. Failure in these therapies has been attributed to premature differentiation and impaired metabolism of the infused T cells. Previous work done in our lab showed that reduced PI3Kδ signaling improved ACT. Because PI3Kγ and PI3Kδ have critical regulatory roles in T cell differentiation and function, we tested whether inhibiting PI3Kγ could recapitulate or synergize PI3Kδ blockade.MethodsTo test this, we primed melanoma specific CD8+ pmel-1 T cells, which are specific to the glycoprotein 100 epitope, in the presence of PI3Kγ (IPI-459), PI3Kδ (CAL101 or TGR-1202) or PI3Kγ/δ (IPI-145) inhibitors following antigen stimulation with hgp100, and then infused them into 5Gy total body irradiated B16F10 tumor bearing mice. We characterized the phenotype of the transferred product by flow cytometry and then assessed their tumor control by measuring the tumor area every other day with clippers. For metabolic assays we utilized the 2-NBDG glucose uptake dye and the real time energy flux analysis by seahorse.ResultsSole inhibition of PI3Kδ or PI3Kγ in vitro promoted greater tumor immunity and survival compared to dual inhibition. To understand how PI3Kδ or PI3Kγ blockade improved T cell therapy, we assessed their phenotype. CAL101 treatment produced more CD62LhiCD44lo T cells compared to IPI-459, while TGR-1202 enriched mostly CD62LhiCD44hi T cells. Because decreased T cell differentiation is associated with mitochondrial metabolism, we focused on CAL101 treated T cells to study their metabolism. We found that CAL101 decreased glucose uptake and increased mitochondrial respiration in vitro, indicating augmented mitochondrial function.ConclusionsThese findings indicate that blocking PI3Kδ is sufficient to mediate lasting tumor immunity of adoptively transferred T cells by preventing premature differentiation and improving mitochondrial fitness. Our data suggest that addition of CAL101 to ACT expansion protocols could greatly improve T cell therapies for solid tumors by preventing T cell differentiation and improving mitochondrial function.

Abstract 60: Induction of T cell dysfunction and NK-like T cell differentiation in vitro and in patients after CAR T cell treatment

2021 ◽  
Author(s):  
Charly R. Good ◽  
Shunichiro Kuramitsu ◽  
Parisa Samareh ◽  
Greg Donahue ◽  
Kenichi Ishiyama ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
T Cell ◽  
T Cell Differentiation ◽  
Cell Dysfunction ◽  
Car T Cell ◽  
Car T ◽  
T Cell Dysfunction
Sign in / Sign up

Export Citation Format

Share Document