Lymphoprep™

Density gradient medium for the isolation of mononuclear cells

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Density gradient medium for the isolation of mononuclear cells
From: 80 USD

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Overview

Lymphoprep™ is a density gradient medium recommended for the isolation of mononuclear cells from peripheral blood, cord blood, and bone marrow by exploiting differences in cell density. Granulocytes and erythrocytes have a higher density than mononuclear cells and therefore sediment through the Lymphoprep™ layer during centrifugation. Lymphoprep™ can be substituted for Ficoll-Paque™ without any need to change your existing protocols and is fully compatible with both SepMate™ and RosetteSep™ .

Lymphoprep™ has a density of 1.077 g/mL.
Contains:
• Sodium diatrizoate (9.1% w/v)
• Polysaccharide (5.7% w/v)
• Other ingredients
Subtype:
Density Gradient Media
Cell Type:
Mononuclear Cells
Species:
Human
Sample Source:
Bone Marrow; Cord Blood; Whole Blood
Selection Method:
Negative
Application:
Cell Isolation
Brand:
Lymphoprep
Area of Interest:
Immunology

Technical Resources

Product Documentation

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Educational Materials

(5)

Data and Publications

Data

Figure 1. Purity and Recovery of Cells from Whole Blood When Using Cost-Effective Lymphoprep™ is Comparable to Using Ficoll-Paque™ PLUS

(A) Density gradient centrifugation of peripheral whole blood using Lymphoprep™ results in similar cell purity of mononuclear cells including T cells, B cells, NK cells, monocytes and granulocytes compared to Ficoll-Paque™ PLUS. (B) The recovery of total mononuclear cells and CD45+ cells is also similar. (n = 5, Mean ± SD).

Figure 2. Purity and Recovery of Cells from Cord Blood When Using Cost-Effective Lymphoprep™ is Comparable to Using Ficoll-Paque™ PLUS

(A) Density Gradient centrifugation of cord blood using Lymphoprep™ results in similar cell purity of mononuclear cells including T cells, B cells, NK cells, monocytes and granulocytes compared to Ficoll-Paque™ PLUS. (B) The recovery of total mononuclear cells and CD45+ cells is also similar. (n = 4, Mean ± SD).

Publications

(8)
Biopreservation and biobanking 2016 OCT

Comparison of Three Isolation Techniques for Human Peripheral Blood Mononuclear Cells: Cell Recovery and Viability, Population Composition, and Cell Functionality.

Grievink HW et al.

Abstract

Routine techniques for the isolation of human peripheral blood mononuclear cells (PBMCs) include density centrifugation with Ficoll-Paque and isolation by cell preparation tubes (CPTs) and SepMate tubes with Lymphoprep. In a series of experiments, these three PBMC isolation techniques were compared for cell recovery and viability, PBMC population composition, and cell functionality, aiming to provide a starting basis for the selection of the most appropriate method of PBMC isolation for a specific downstream application. PBMCs were freshly isolated from venous blood of healthy male donors, applying the different techniques in parallel. Cell recovery and viability were assessed using a hemacytometer and trypan blue. Immunophenotyping was performed by flow cytometry. Cell functionality was assessed in stimulated (100 ng/mL staphylococcal enterotoxin B [SEB]) and unstimulated 24 hours PBMC cultures, with cytokine production and lactate dehydrogenase (LDH) release as readout measures. PBMC isolation by SepMate and CPT resulted in a 70% higher recovery than Ficoll isolation. CPT-isolated populations contained more erythrocyte contamination. Cell viability, assessed by trypan blue exclusion, was 100% for all three isolation techniques. SepMate and CPT isolation gave higher SEB-induced cytokine responses in cell cultures, for IFN$ and for secondary cytokines. IL-6 and IL-8 release in unstimulated cultures was higher for CPT-isolated PBMCs compared to Ficoll- and SepMate-isolated PBMCs. LDH release did not differ between cell isolation techniques. In addition to criteria such as cost and application practicalities, these data may support selection of a specific PBMC isolation technique for downstream analysis.
Neuroscience letters 2016 NOV

Generation of disease-specific autopsy-confirmed iPSCs lines from postmortem isolated Peripheral Blood Mononuclear Cells.

Belle K et al.

Abstract

Understanding the molecular mechanisms that underlie neurodegenerative disorders has been hampered by a lack of readily available model systems that replicate the complexity of the human disease. Recent advances in stem cell technology have facilitated the derivation of patient-specific stem cells from a variety of differentiated cell types. These induced pluripotent stem cells (iPSCs) are attractive disease models since they can be grown and differentiated to produce large numbers of disease-relevant cell types. However, most iPSC lines are derived in advance of, and without the benefit of, neuropathological confirmation of the donor - the gold standard for many disease classifications and measurement of disease severity. While others have reported the generation of autopsy-confirmed iPSC lines from patient explants, these methods require outgrowth of cadaver tissue, which require additional time and is often only successful ∼50% of the time. Here we report the rapid generation of autopsy-confirmed iPSC lines from peripheral blood mononuclear cells (PBMCs) drawn postmortem. Since this approach doesn't require the propagation of previously frozen cadaver tissue, iPSC can be rapidly and efficiently produced from patients with autopsy-confirmed pathology. These matched iPSC-derived patient-specific neurons and postmortem brain tissue will support studies of specific mechanisms that drive the pathogenesis of neurodegenerative diseases.
The Journal of Immunology 2015

The Thrombin-Derived Host Defense Peptide GKY25 Inhibits Endotoxin-Induced Responses through Interactions with Lipopolysaccharide and Macrophages/Monocytes

Hansen FC et al.

Abstract

Host defense peptides have recently gained much interest as novel anti-infectives owing to their ability to kill bacteria and simultaneously modulate host cell responses. The cationic host defense peptide GKY25 (GKYGFYTHVFRLKKWIQKVIDQFGE), derived from the C terminus of human thrombin, inhibits proinflammatory responses in vitro and in vivo, but the mode of action is unclear. In this study, we show that GKY25, apart from binding bacterial LPS, also interacts directly with monocytes and macrophages in vitro, ex vivo, and in vivo. Moreover, GKY25 inhibits TLR4- and TLR2-induced NF-$B activation in response to several microbe-derived agonists. Furthermore, GKY25 reduces LPS-induced phosphorylation of MAPKs p38$ and JNK1/2/3. FACS and electron microscopy analyses showed that GKY25 interferes with TLR4/myeloid differentiation protein-2 dimerization. The results demonstrate a previously undisclosed activity of the host defense peptide GKY25, based on combined LPS and cell interactions leading to inhibition of TLR4 dimerization and subsequent reduction of NF-$B activity and proinflammatory cytokine production in monocytes and macrophages.
The Journal for Immunotherapy of Cancer 2015

Early transduction produces highly functional chimeric antigen receptor-modified virus-specific T-cells with central memory markers: a Production Assistant for Cell Therapy (PACT) translational application

Sun J et al.

Abstract

BACKGROUND: Virus-specific T-cells (VSTs) proliferate exponentially after adoptive transfer into hematopoietic stem cell transplant (HSCT) recipients, eliminate virus infections, then persist and provide long-term protection from viral disease. If VSTs behaved similarly when modified with tumor-specific chimeric antigen receptors (CARs), they should have potent anti-tumor activity. This theory was evaluated by Cruz et al. in a previous clinical trial with CD19.CAR-modified VSTs, but there was little apparent expansion of these cells in patients. In that study, VSTs were gene-modified on day 19 of culture and we hypothesized that by this time, sufficient T-cell differentiation may have occurred to limit the subsequent proliferative capacity of the transduced T-cells. To facilitate the clinical testing of this hypothesis in a project supported by the NHLBI-PACT mechanism, we developed and optimized a good manufacturing practices (GMP) compliant method for the early transduction of VSTs directed to Epstein-Barr virus (EBV), Adenovirus (AdV) and cytomegalovirus (CMV) using a CAR directed to the tumor-associated antigen disialoganglioside (GD2). RESULTS: Ad-CMVpp65-transduced EBV-LCLs effectively stimulated VSTs directed to all three viruses (triVSTs). Transduction efficiency on day three was increased in the presence of cytokines and high-speed centrifugation of retroviral supernatant onto retronectin-coated plates, so that under optimal conditions up to 88% of tetramer-positive VSTs expressed the GD2.CAR. The average transduction efficiency of early-and late transduced VSTs was 55 ± 4% and 22 ± 5% respectively, and early-transduced VSTs maintained higher frequencies of T cells with central memory or intermediate memory phenotypes. Early-transduced VSTs also had higher proliferative capacity and produced higher levels of TH1 cytokines IL-2, TNF-$, IFN-$, MIP-1$, MIP-1$ and other cytokines in vitro. CONCLUSIONS: We developed a rapid and GMP compliant method for the early transduction of multivirus-specific T-cells that allowed stable expression of high levels of a tumor directed CAR. Since a proportion of early-transduced CAR-VSTs had a central memory phenotype, they should expand and persist in vivo, simultaneously protecting against infection and targeting residual malignancy. This manufacturing strategy is currently under clinical investigation in patients receiving allogeneic HSCT for relapsed neuroblastoma and B-cell malignancies (NCT01460901 using a GD2.CAR and NCT00840853 using a CD19.CAR).
The Journal of Immunology 2015

Skin Metabolites Define a New Paradigm in the Localization of Skin Tropic Memory T Cells

McCully ML et al.

Abstract

The localization of memory T cells to human skin is essential for long-term immune surveillance and the maintenance of barrier integrity. The expression of CCR8 during naive T cell activation is controlled by skin-specific factors derived from epidermal keratinocytes and not by resident dendritic cells. In this study, we show that the CCR8-inducing factors are heat stable and protease resistant and include the vitamin D3 metabolite 1$,25-dihydroxyvitamin D3 and PGE2. The effect of either metabolite alone on CCR8 expression was weak, whereas their combination resulted in robust CCR8 expression. Elevation of intracellular cAMP was essential because PGE2 could be substituted with the adenylyl cyclase agonist forskolin, and CCR8 expression was sensitive to protein kinase A inhibition. For effective induction, exposure of naive T cells to these epidermal factors needed to occur either prior to or during T cell activation even though CCR8 was only detected 4-5 d later in proliferating T cells. The importance of tissue environments in maintaining cellular immune surveillance networks within distinct healthy tissues provides a paradigm shift in adaptive immunity. Epidermal-derived vitamin D3 metabolites and PGs provide an essential cue for the localization of CCR8(+) immune surveillance T cells within healthy human skin.
STEMCELL TECHNOLOGIES INC.’S QUALITY MANAGEMENT SYSTEM IS CERTIFIED TO ISO 13485. PRODUCTS ARE FOR RESEARCH USE ONLY AND NOT INTENDED FOR HUMAN OR ANIMAL DIAGNOSTIC OR THERAPEUTIC USES UNLESS OTHERWISE STATED.
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