[Histonet] Becky Orr

2012-11-09 Thread Andrea T. Hooper
I'm looking to contact Rebecca (Becky) Orr. Does anyone know her current email address? The one I have bounced back.   Thanks, Andrea ___ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet

[Histonet] Snap frozen to FFPE

2012-11-05 Thread Andrea T. Hooper
Hi All, Do you have a protocol for formalin fixation (and processing to FFPE) of a previously snap frozen piece of tissue? Or advice as to the best method of snap freezing for such a process (assume isopentane slurry)? We have done this for several tissues with our standard fixation and processi

[Histonet] Block age/labile epitopes

2011-09-24 Thread Andrea T. Hooper
Just curious as to at what shelf-life people consider their blocks too "old" to rely on for IHC data? Along those lines I am wondering about labile antigens ... does anyone know how fast epitopes may "disappear" from blocks and what are some good examples of labile epitopes/antigens? As usual an

Re: [Histonet] So long, and thanks for all the help

2011-09-24 Thread Andrea T. Hooper
Congratulations Dr. Adam on your recent defense (yay). Thanks for the kind words, I have enjoyed emailing with you and discussing bone IHC. We will miss you on Histonet and I certainly hope you return to research once you have completed your clinical years (if not sooner). Best, Andrea _

[Histonet] Predicting antibody IHC activity

2011-09-23 Thread Andrea T. Hooper
Hi All, I am wondering if anyone knows of any particular publications or studies that have examined manners in which one can predict whether an antibody in a large panel may work in IHC. Let's say you are faced with 50-100 Abs and you need to determine which works in IHC, but all you know is bi

[Histonet] Anti-RFP

2011-07-13 Thread Andrea T. Hooper
Is anyone currently staining for RFP in FFPE or frozen sections using a detecting antibody? I am curious as to what anti-RFP Ab would be recommended. There is one I plan to try from Invitrogen (rabbit anti-RFP) but of course would love feedback if people have used one in particular.   Thanks, An

Re: [Histonet] In search of a cryostat...

2011-07-13 Thread Andrea T. Hooper
Agree, switching to Leica with disposable blade holder changed my life. Never looked back. Love the CM3050S. --- On Sun, 7/10/11, Rene J Buesa wrote: From: Rene J Buesa Subject: Re: [Histonet] In search of a cryostat... To: "histonet@lists.utsouthwestern.edu" , "Tom McNemar" Date: Sunday,

Re: [Histonet] confocal questions: mixing fluorescent dyes with proteins

2011-07-13 Thread Andrea T. Hooper
It will depend on how your scope is configured. On our system, when using the three you have outlined I routinely use CY5 or Alexa633 (or equivalent in far red category) on our scope. It's actually my personal favorite. If you have any doubts check out the spectral viewer on Invitrogen and also

[Histonet] Antigen retrieval survey

2011-07-13 Thread Andrea T. Hooper
Hi All,   I am doing a survey and will be happy to compile results and share if folks will respond! What is your favorite antigen retrieval method and/or panel?   Buffer Source/composition Temperature Device   Thanks, Andrea ___ Histonet mailing li

Re: [Histonet] Assay for cell death needed

2010-04-01 Thread Andrea T. Hooper
Use the TUNEL assay, several very easy to use kits available. Roche's Cell Death Detection kit with FITC might be the easiest. --- On Thu, 4/1/10, Alexandra Meinl wrote: From: Alexandra Meinl Subject: [Histonet] Assay for cell death needed To: "Histonet" Date: Thursday, April 1, 2010, 9:00

RE: [Histonet] mouse perfusion rate

2010-03-31 Thread Andrea T. Hooper
Very interesting! Coming out the nose is definitely bad for any work I have done in the past - lungs get blown out, liver doesn't perfuse well and bone marrow looks horrific. However, if you are working with PFA and doing a post-fix anyway, you will probably be fine. If you are using GA and coun

Re: [Histonet] Incubation of Ab more then 1 hour in autostainer

2010-03-22 Thread Andrea T. Hooper
We used to do overnight in our DAKO Autostainer many years ago, and we kept many containers of dH20 in the incubator to make a humid chamber. Seemed to work well - although we realized overnight was overkill and 1-2 h was sufficient. In fact, given this we started to always put humid chambers in

Re: [Histonet] IF staining on peritoneal macrophages

2010-03-04 Thread Andrea T. Hooper
aries in 0.2X concentration of your block.   If you want to share your protocol, maybe I can give you some further tips?   Let me know if I can help further, Andrea   --- On Wed, 3/3/10, Mauricio Avigdor wrote: From: Mauricio Avigdor Subject: Re: [Histonet] IF staining on peritoneal macrophages

Re: [Histonet] IF staining on peritoneal macrophages

2010-03-04 Thread Andrea T. Hooper
overkill.   Let me know if you need anything else, Andrea     --- On Wed, 3/3/10, Mauricio Avigdor wrote: From: Mauricio Avigdor Subject: Re: [Histonet] IF staining on peritoneal macrophages To: "Andrea T. Hooper" , histonet@lists.utsouthwestern.edu Date: Wednesday, March 3, 2010,

Re: [Histonet] IF staining on peritoneal macrophages

2010-03-03 Thread Andrea T. Hooper
. I would give you the catalog number except I am not at my computer. Andrea T. Hooper ___ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet

Re: [Histonet] IF staining on peritoneal macrophages

2010-03-03 Thread Andrea T. Hooper
. I would give you the catalog number except I am not at my computer. Andrea T. Hooper ___ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet

Re: [Histonet] Snap Freezing Tissue

2010-02-25 Thread Andrea T. Hooper
t: Re: [Histonet] Snap Freezing Tissue To: "Andrea T. Hooper" Cc: histonet@lists.utsouthwestern.edu, "Laurie Colbert" , "Steve Pike" Date: Wednesday, February 24, 2010, 10:31 PM I learned to freeze tissue by taking a beaker and filling it with 2-methylbutane and t

Re: [Histonet] Snap Freezing Tissue

2010-02-24 Thread Andrea T. Hooper
rm storage.   If snap freezing tissue for RNA/protein extraction I use the classic isopentane cooling method.   Andrea T. Hooper --- On Wed, 2/24/10, Laurie Colbert wrote: From: Laurie Colbert Subject: [Histonet] Snap Freezing Tissue To: histonet@lists.utsouthwestern.edu Cc: "St

Re: Re: [Histonet] Double labeling with antibodies that need differentfixatives

2010-02-24 Thread Andrea T. Hooper
Not sure if you were asking me or not and it's a broad answer but VE-cadherin is a good one - the best overall marker of endothelium. vWF is another one that works well for most tumors. If staining mouse organs, if you let me know what tissue you are staining I can recommend the best specific ma

Re: [Histonet] M.O.M frozen section background

2010-02-24 Thread Andrea T. Hooper
What types of mouse tissue are you working with? Are they fresh frozen with post-fixation or fixed frozen? Do you block biotin? Do you have an isotype control and a no primary control?  I am thinking biotin's the likely culprit as the kit doesn't come with the very necessary biotin blocking reag

Re: [Histonet] Double labeling with antibodies that need different fixatives

2010-02-24 Thread Andrea T. Hooper
to mention the autofluorescence from RBCs. I am afraid of false positives. --- On Tue, 2/23/10, Adam . wrote: From: Adam . Subject: Re: [Histonet] Double labeling with antibodies that need different fixatives To: "Andrea T. Hooper" Cc: "Phebe Verbrugghe" , histonet@lists.utsouthwes

RE: [Histonet] Double labeling with antibodies that need different fixatives

2010-02-23 Thread Andrea T. Hooper
Hi Phebe,   In my experience that CD31 clone you refer to doesn't work well mainly b/c of paraffin embedding -  in combination with PFA/formalin fixation. On PFA/formalin fixed frozen samples it works just fine with a trypsin antigen retrieval step. I find it's the paraffin that is the real kill

Re: [Histonet] EDTA

2010-02-22 Thread Andrea T. Hooper
Although what you say is true, it is worth noting that there are some antigens/antibodies more amenable to acid decal. I have experienced this myself several times recently and been burned by thinking EDTA will always give better IHC results. At least for murine bone marrow vasculature antigens,

Re: [Histonet] IHC on N-cadherin, CD146, CD144,ELF97 TRAcP.

2010-02-22 Thread Andrea T. Hooper
Hi Julia,   I am sorry it's taken me months to reply to this email and hopefully it's not too late. I am only catching up on Histonet messages recently.   I stain for VE-cadherin, CD144 in murine bone routinely. R&D Systems goat anti-mouse VE-cadherin works very well in paraffin and frozen murine

Re: [Histonet] IF staining on peritoneal macrophages

2010-02-22 Thread Andrea T. Hooper
After cytospinning I always dry my slides thoroughly before moving on to a IHC or IF step. I also use Superfrost Plus slides or silane coated slides to increase adherance. I would do that then try various fixatives.   You can make a cell pellet as you suggest. Decide ahead of time if you want to

RE: [Histonet] Re: EDTA

2010-02-22 Thread Andrea T. Hooper
For many years doing IHC on mouse bones, I have used 10% EDTA, just pHed up to where it goes into solution, with great results for frozen section immunofluorescence. It takes 5 days. For FFPE, we use Richard Allan Decal solution which is HCl and EDTA. Also works great and only takes 1 hour for

Re: [Histonet] RE: alternative to Glucose oxidase (GLUOX) peroxidase block

2009-10-29 Thread Andrea T. Hooper
Couldn't agree with Gayle more!   Glucose oxidase is the best protocol for blocking endogenous peroxidase but isn't entirely necessary unless you are working with hematopoietic tissue or tissue that has a large leukocyte infiltrate. For muscle standard 0.3% H202 should be fine. Of course if you

Re: [Histonet] Isotype background

2009-10-15 Thread Andrea T. Hooper
Your protocol is fine. It's precisely my protocol. What do you get when you do the no primary control? Although this control isn't sufficient for publication it is necessary for troubleshooting. In fact performing the following controls together can tell you exactly where the problem lies:

[Histonet] VEGFR2 antibody

2009-10-06 Thread Andrea T. Hooper
Hi everyone! It's good to be back ... I have resubscribed under a different email as I switched place of employment.    I am just running a poll as to what your favorite anti-VEGFR2 antibody is for immunostaining human tissue or cells. Frozen or paraffin, cells or tissues ... it's all good info

Re: [Histonet] Differences between WB antibody and IHC antibody

2009-01-02 Thread Andrea T. Hooper
Whether or not an antibody can be used for western vs IHC depends on many factors. Some antibodies can be used for both, some can be only used for one vs another, and some cannot be used for either. There are quite a few factors to consider and here are a few from the top of my head (and I a