title: Combined immunocytochemistry and FISH: an improved method to study engraftment of accessory bone marrow stromal cells.
abstract: In aplastic anaemia (AA), correction of bone marrow (BM) stromal function may contribute to the outcome of bone marrow transplantation (BMT). Engraftment of BM stromal cells is rarely observed, but engraftment of accessory cells (macrophages and T cells) may be important. We have improved a method of combined immunocytochemistry and FISH described by van Tol et al. (1998) to define the cellular origin and time course of engraftment of BM stromal accessory cells after sex-mismatched BMT. Long-term bone marrow cultures were trypsinized and cytospin preparations stained by immunocytochemistry using monoclonal antibodies against specific cell lineages followed by FISH for X and Y chromosomes. Low level phase contrast microscopy was used to study staining of individual cells simultaneously with fluorescence microscopy to define chromosomal pattern. In controls, the combined procedure did not affect the intensity of APAAP staining or the accuracy of sex chromosome determination. In cultures from AA patients after sex-mismatched BMT, cell lineages could be identified and donor or recipient origin determined unequivocally. This procedure enabled us to examine the origin (host/donor) of different cell lineages with high confidence, in addition to producing images of the combined staining.
authors.affiliation: Department of Haematology, St George's Hospital Medical School, London, UK.
authors.forename: M
authors.initials: M
authors.lastname: Ismail
authors.forename: F M
authors.initials: FM
authors.lastname: Gibson
authors.forename: K
authors.initials: K
authors.lastname: Marks
authors.forename: G S
authors.initials: GS
authors.lastname: Draycott
authors.forename: E C
authors.initials: EC
authors.lastname: Gordon-Smith
authors.forename: T R
authors.initials: TR
authors.lastname: Rutherford
mesh_terms: D000328:Adult; D000741:Anemia, Aplastic / Q000473:pathology / Q000628:therapy; D018952:Antigens, CD34; D016026:Bone Marrow Transplantation; D019070:Cell Lineage; D041321:Chromosomes, Human, X; D041322:Chromosomes, Human, Y; D005260:Female; D006085:Graft Survival; D006412:Hematopoietic Stem Cells / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D017404:In Situ Hybridization, Fluorescence; D007399:Interphase; D008297:Male; D008856:Microscopy, Fluorescence; D008858:Microscopy, Phase-Contrast; D008875:Middle Aged; D017154:Stromal Cells / Q000737:chemistry* / Q000648:ultrastructure; D016176:T-Lymphocyte Subsets / Q000473:pathology; D018183:Transplantation Chimera; D014184:Transplantation, Homologous
chemical_list: D018952:Antigens, CD34