Histology Lab Service Core
The Histology Core is part of the Bone and Body Composition Core of the Indiana Clinical Translational Sciences Institute (CTSI). It is also a core facility of the Indiana Center for Musculoskeletal Health. The Histology Core provides histological services for basic science (non-clinical) research. Both mineralized (plastic embedded) and soft tissue (paraffin embedded) specimens can be prepared by the facility.
Plastic (methyl methacrylate) Embedding and Sectioning Service
This research facility offers processing of specimens through plastic (methyl methacrylate; MMA) embedding as well as thick sectioning of cortical bone, thin sectioning of trabecular (cancellous) bone, and staining of plastic sections.
The facility provides cover-slipped unstained sections for analysis of fluorochromes (dynamic histomorphometry) at no charge. Specialized stains (for static histomorphometry) are available. Goldner’s Trichrome (GT; osteoid, osteoblasts and osteoclasts), Hematoxylin and eosin (HE; routine assessment) and Toluidine Blue (TB; cement lines and cartilage) are available for both thick and thin sections. Tartrate-Resistant Acid Phosphatase (TRAP; osteoclasts) and Von Kossa / MacNeal (VKM; osteoid, osteoblasts and osteoclasts) are available for thin sections only.
Paraffin Embedding and Sectioning Service
The Histology Core offers de-mineralization of mineralized tissue (if necessary), processing of specimens through paraffin embedding, thin sectioning of paraffin-embedded tissue, and staining of paraffin sections.
For routine assessment, slides are stained with hematoxylin and eosin (HE; Harris hematoxylin, regressive method). Specialized stains are available, including Acidified Toluidine Blue (AcTB; for mast cells); Fast Green – Safranin O (FG/SO; for cartilage); Gomori’s Aldehyde Fuchsin, Wenk Modification (GAF; for pancreatic β cells, elastin, mast cells); Jones’ Periodic Acid-Silver Methenamine, AFIP Modification (JPA-ArM; for kidney glomerular capillary basement membrane); Masson’s Trichrome (MT; for collagen); Oil Red O (ORO; for lipids); Periodic Acid Schiff Procedure (PAS; for carbohydrates); Perls Iron Stain (PI); Tartrate-Resistant Acid Phosphatase (TRAP; for osteoclasts); Verhoeff-Van Giesen (VVG; for elastin); and Von Kossa Method for Mineral (VK).
Materials for processing can be dropped off on the bench opposite the lab door (MS-5045G). All submissions require a completed work order form.
Formalin-fixed tissue for either plastic or paraffin embedding should be submitted immersed in 70 percent ethanol (EtOH), not formalin. Specimens not submitted in histology cassettes will be charged for cassettes, if appropriate.
N.B. Cassettes must be labeled with either pencil or solvent-resistant markers as listed below. Labeling done with Sharpies® or similar ink pens comes off during processing. Approved marking pens include Cancer Diagnostics Moist Marker Plus from Lab Safety Supply, HistoPrep Pen from Fisher Scientific, Klinipath KP Marker Plus from Mercedes medical, and Stafmark Pen from Statlab Medical Products.
Blocks for re-cutting and slides for staining can be submitted as is. The designated contact person will be notified by email when the work order is complete. For questions concerning submissions, email Drew Brown.