- Simon Gebremeskel added an answer:How can I detect Treg cells from peripheral blood?
I want to detect Treg cells from peripheral blood, and I can use PBMC, but when I try to do directly the whole blood I got CD4+CD25+Foxp3+Treg cells and I found similar result with previously reported % of Treg cell using PBMC; do you think my experiment is wrong?
I use BD Transcription Factor Buffer Set. Material Number 562574, and BD FACSCANTO II.
I think they approach yo are taking is correct. Just depends with how you represent the data and the gating strategy you use.Following
- Per H Larsson added an answer:What are the immune cell's composition (in percent) in sheep PBMCs?
Mainly looking for CD14, CD4, CD8, gamma-delta T-cells, NK cells and B-cells.
Have you seen this?
- Ketil Winther Pedersen added an answer:Is there an antibody available commercially for expansion and selective enrichment of human CD4 or CD8 T cells in culture?
I want to generate CD4 or CD8 T cells from PBMC in culture with minimal manipulation (i.e. no antigen stim and no flow/magnet sorting). Years ago I used a CD3,4b bi-specific monoclonal antibody from J. Wong (Jones et al J Immunol Meth 274:139, 2003) that acted by negative selection to enrich for CD8 T cells, and vice versa for CD3,8 mAb and CD4 T cells, both of which worked really well. Now I can't find similar reagents available commercially...
I have used Dynabeads CD3/CD28 to expand T cells, but I am looking for CD4 or CD8 enrichment specifically. Thanks for any suggestions on finding these reagents.
Hi, for isolation of CD4+ or CD8 positive cells from PBMC an alternative is to use the Dynabeads Untouched CD4 T-cell Kit/Dynabeads Untouched CD8 T-cell kit. Both kits are compatible with downstream activation or expansion using Dynabeads CD3/CD28 beads. Feel free to contact me at any time. kind regards, ketilFollowing
- Raul Jimenez Heredia added an answer:Which is the best way to isolate lymphocytes from a renal biopsy?
I am currently working on characterization of lymphocytes extracted from diseased kidney tissue (i.e. acute rejection). Until now the piece of kidney that we received was big enough to extract lymphocytes just by mechanical dissection, but in the next weeks we will receive small biopsies and I am not sure if mechanical dissection will be enough. Also, I have read that with enzymatic digestion the surface markers can be disrupted by the collagenase (and I need them for further FACS analysis). Any suggestion?
Thank you in advance!
Thank you very much for your answers. For the first samples we will try mechanical dissociation manually and then probably collagenase IV, that has very low concentration of trypsin. If it works out we will think about the Medimachine.
Ishak, can I ask you if you have used before the Medimachine for lymphocyte isolation from tissue or if you know any specific publication related?
Thank you in advance, and I will describe the results after the first try.Following
- Dirk Werling added an answer:What is the procedure to isolate mononuclear cells from milk of buffaloes for FACS analysis ?
I want to analyse CD4 and CD8 cells from milk by Flow cytometry.
Mahavir, unless your buffaloes have mastitis, you won't find hardly any Tc in normal milk. The majority of cells will be epi-/endothelial cells, macrophages and granulocytes. Very tedious to sort T cells from milk. In some cases, we started of with a couple of litres to obtain 10e7 T cells. Remember, normal lymphozyte migration into the udder doesnt happen until blood-udder barrier is disturbed.Following
- Jaehak Oh added an answer:How can I make the Mouse Treg Suppression Assay work?
I would like to investigate the suppressive capacity of Tregs isolated from mouse spleens and lymph nodes. I already did the experiment twice but in both cases the responder T-cells proliferated MORE when Tregs were present.
We FACS sorted CD4+, CD45RBhigh, CD25- as naive responder T-cells and the Tregs as CD4+ CD45RBlow, CD25+. The stimulus was plate-bound CD3/CD28 and in a second approach we tried a low PMA/Iono concentration. However, co-incubation of 100 000 naive T-cells together with 100 000 Treg lead to enhanced proliferation.
So I thought that in the population we sorted as "Tregs" there may be some activated T-cells present. That's why we included CD62L for sorting of the Tregs in our second experiment. The stimulus was again plate-bound CD3/CD28 and this time we also tried CD3/CD28-Dynabeads in parallel. But the problem of enhanced proliferation remains.
Does anyone have experience with mouse Treg suppression assays and can give some advice?
The problem may be derived from your responder than Treg.
I once managed to test CD4+CD25-CD45RBhi vs. whole CD4+CD25- as responders and surprisingly found that the CD4+CD25-CD45RBhi is not suppressed by CD4+CD25+Treg in vitro as you said. I guess you might want to use naive CD4 T cells or copy IBD by sorting only CD45RBhi in vitro. But CD45RBlo seems to be included as a responder in Treg suppression assay. I didn't follow up further on the exact reason but I only used whole CD25- as the responder since then and it has been suppressed very well. Try to include CD45RBlow as well in the responder.
Hope this helpsFollowing
- Ayşe Balamir added an answer:Does anyone know about a human oligodendrocyte with naive human CD4 T cell co culture method?
I need some information indirect co culture or firstly about primary CD4 T cell culture method. I am planning PBMC from human blood then I am using human CD4 T cell isolation kit II (MACS) for CD4 T cell culture. But I don't know necessary reagent for first primary culture and after needed for co culture with commercial human precursor oligodendrocyte?
Thank you, Daniel
actually I want to know Th17 cells isolation from PBMC and after planning to use naive human CD4 T cell isolation Kit II for CD4 T cell culture with specific reagents and following FACS but I needed some information or protocol for using reagents that I haven't know yet and visualizing Th17 cells on FACS.Following
- Mehdi Mahdavi added an answer:Which antibody manufacturer should I choose?I don't have much experience and I need to analyze some cell markers on flow cytometry as CD38 on human lymphocytes. Does anybody know if Biolegend antibodies are a good choice? Or which manufacturer should I choose?
RnD system , BD-Bioscience, eBioscience........Following
- Mehdi Mahdavi added an answer:Does anybody have experience in and/or a protocol for the isolation of lymphocytes from gut tissue?
I'm struggeling to get lymphocytes out of gut tissue (inflamed small intestine). We have been using different percoll gradients and protocols, but nothing worked out. Would be great if anyone could help! Thanks a lot!!
Separate gut tissue and wash with PBS. Then dissect and then digest with Collagenase 1mg/ml, DNAse 50 mic/ml, Hyaloronidase for 45 min at 37 degree C and after pipeting the sample should pass through cell 100 mic mesh and lymphocyte seperated using ficole method.Following
- Anne Lodge added an answer:Which is the best of the different sources for mouse CD4+ T cells, spleen or lymph?
Can anyone explain, which source is best for isolation of mouse CD4+ T cells for basic functional assays, spleen or lymph nodes?
In addition, I haven't noticed anyone isolating CD4+ T cells from mouse peripheral blood. Is there a particular reason for this?
I've tried to get mouse PBMC and it is just not easy. It seems like there are more rbc and it is harder to get separation of the mononuclear cells from the rbc. And remember that from a single mouse you can get perhaps 1 mL of whole blood but from a human it is easy to get 50 mL. The lymph nodes and spleens are just packed with lymphocytes. If we could easily get those from humans we'd be doing that instead of blood.Following
- Anh Do added an answer:Do you know the easiest way to isolate lymphocytes in lamina propria in an experimental mouse model?I'm doing an experiment about inflammatory bowel disease in mouse models. I performed IHC in murine colonic tissue, and the lamina propria lymphocytes were well stained with the primary antibody. Next, I want to estimate the mRNA and protein levels in lamina propria lymphocytes.
I know there are several ways to isolate lamina propria lymphocytes in mouse models, However, they are very complex and time-consuming. These ways also require much trial and error. In addition, I don't have the reagents necessary for the isolation methods. Do I have to buy all the reagents, or is there another way to source them?
I would like to know the easiest way to isolate LP lymphocytes in mouse model.
Hi Ekaterina Vladimirovna Sidorova, Jon Jo
How do you dissolve 5mM EDTA? And what is the final pH of the EDTA solution used to disrupt epithelial cells?
Thank you very much.Following
- Sergei B Koralov added an answer:Do you have suggestions for a good method to extract lymphocytes from mouse skin for cytokine profile analysis?We are looking to extract CD4+ T cells from diseased mouse skin for lymphocyte analysis. So far the protocols we have tried either yield only ~500 cells from a 1 cm sq of skin (healthy c57Bl/6 mice) or have such a harsh liberase treatment that some markers such as CD4/8 that we need for our FACS analysis are lost and all are rather inconsistent. If anyone has a good protocol we would really appreciate your advice!Hi Prem,
Thanks for the link. Indeed we've considered Dr. Clark's and Dr. Kupper's method and there are certainly advantages to it, I am a bit hesitant to adapt it for our purposes because the extravasation of T cells into the 3D matrices is accompanied by >10x expansion and by significant molecular changes in the cells including upregulation of the activation markers. While the clonality of the cells should not change, I am concerned that the nature of the cells may be quite different - as we are analyzing tumor cells and are also transferring the T lymphocytes into RAG KO and B6 hosts, I am a bit concerned about changes that may take in these cells in the course of extravasation...Following
- Melanie Dimapasoc asked a question:Has anyone used SepMate tubes + Ficoll for PBMC isolation?If so, have you noticed any difference in RBC, monocyte and/or granulocyte contamination, compared to using Ficoll alone? Also, have you noticed any difference in lymphocyte yield between the two procedures? I am running some validation studies to compare the two separation procedures and have been having some issues with contamination and decreased lymphocyte yields over time using SepMate + Ficoll.Following
- Marina Ninkov asked a question:Can anyone help me with lymphocyte isolation from a rat's small intestine?Is it possible to use 2-mercaptoethanol instead of DTT?Following