A bone marrow sample showed a hyporegenerative state.
CD38bright+ plasma cells in fresh multiple myeloma (MM) bone marrow (BM) samples showed weaker 67LR expression, but expression increased after direct exposure to a BM endothelial cell line (4LHBMEC).
Marrow aspiration sample showed 28% lymphoid cells.
Sequential samples showed increased bone marrow CD4/CD8 ratios in all cases of progression to bone marrow involvement.
Bone marrow aspiration was performed if peripheral blood samples showed an improvement that fulfilled the criteria for CR.
In group 2, 19 of 24 bursa tissue samples, two bone marrow samples, a thymus sample and four bursa swab samples showed positive results.
These samples showed normal levels of Ki-67+ proliferating Ki-67+ proliferatingwith normal bone marrow samples.
Acute myeloid leukaemia samples showed heterogeneous BRCA1 mRNA levels, which were lower than those of normal bone marrows (P=0.0001).
The human bone marrow samples were collected from normal donors with written consent form for use in this study, and these individual RNA samples showed very similar expression profiles in a prior unrelated project.
In contrast, collagenase-digested bone samples showed a two-fold increase in Wnt4 mRNA levels with age (Fig. 3C), suggesting that the late appearance of a phenotype could be due to age-related changes in the bone marrow microenvironment.
