I forgot to mention that the H&E was performed in another lab at our facility...most likely on an autostainer. We just did the IHC studies and I have always used 70% ETOH for tissue storage ... never heard of this staining phenomenon happening before.
Brett -----Original Message----- From: histonet-boun...@lists.utsouthwestern.edu [mailto:histonet-boun...@lists.utsouthwestern.edu] On Behalf Of Connolly, Brett M Sent: Tuesday, July 02, 2013 9:08 AM To: histonet@lists.utsouthwestern.edu Subject: [Histonet] H&E staining question Histonetters - We had some rat tissues that were removed at necropsy and immediately fixed in formalin for 48 hrs. Since the tissues could not be processed after the 48 hr fixation they were transferred to 70% ETOH for about a week, then processed and stained with H&E. The H&E staining looks faded/washed out when compared to previous rat tissue that was fixed for 48 hr and then processed and stained without the extended time in 70% ETOH. The reason for limiting the fixation to 48 hr in the more recent study was that we were doing some IHC stains and wanted to keep the same fixation time as the previous study. I have extra unstained slides left over - any suggestions on how to get some better, crisper H&E results? Has anyone observed the washed out H&E appearance from tissues stored in 70% ETOH. Thanks, Brett Brett M. Connolly, Ph.D. Principal Scientist, Imaging Dept. Merck & Co., Inc. PO Box 4, WP-44K West Point, PA 19486 brett_conno...@merck.com T- 215-652-2501 F- 215-993-6803 Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates Direct contact information for affiliates is available at http://www.merck.com/contact/contacts.html) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system. _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet Notice: This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), and/or its affiliates Direct contact information for affiliates is available at http://www.merck.com/contact/contacts.html) that may be confidential, proprietary copyrighted and/or legally privileged. It is intended solely for the use of the individual or entity named on this message. If you are not the intended recipient, and have received this message in error, please notify us immediately by reply e-mail and then delete it from your system. _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet
