Receiving Lab Preservation Requested:
•Remove excess tissues around organ of interest
•Consider collecting samples of lymph nodes, excess large vessels, nerves, other tissues
Best to place these back in storage buffer and Tend to organ of interest First)
•Sample or section organ into pieces representing major anatomical features of the organ (eg lobes, proximal/distal) •(eg. 8 segments in liver)
•From each anatomical segment, prepare at least 5 sets of tissue samples be preserved, neighboring tissue (alternating) preserved in multiple ways as needed for down-stream assay.
•Divide these pieces serially into approximately 0.5 – 1 cm^3 portions (and photograph)
•Further preserve these sequential tissue pieces in:
•10% formalin, processed then to paraffin (FFPE) (ovary 4%PFA (sucrose?) in PE)
•Fresh Frozen, without fixative in cryovial over liquid nitrogen and stored at -80deg
(Skin – sc prep on fresh without freezing, as well as a sample frozen over Liz N2)
•Fresh Frozen embedded in OCT over dry ice/ethanol or dry ice isopentane bath (liver isopentane)
(Kidney prefers - metal block (aluminum ¾-1 in) over liquid nitrogen)
•Fresh Frozen embedded in CMC over dry ice/ethanol or dry ice isopentane bath
•4% PFA, cryoprotected in 10% sucrose, embedded in OCT over dry ice/ethanol or dry ice isopentane
bath (not typical for skin).
•Complete Metadata Ingest Sheet for
1) Organ pieces (“block”),
2) Tissue blocks (both organ pieces and blocks for sectioning),
3) Sections or Suspensions
•These tissues, aside from what the receiving TMC uses them for, are to be bio-banked
and shared with other members of the HuBMAP Consortium
•Assay of multiple tissues will be done at one or more locations with expertise in that assay, or if TMC with expertise in the tissue will run their own version of that assay.