To confirm the single integration event, an eIF-5A2 probe was used to hybridize to the metaphase spreads from bone marrow lymphocytes by fluorescence in situ hybridization (FISH).
Metaphases were harvested from cultured MEFs by Colcemid treatment (0.03 μg/ml) for 3 hr or from bone marrow lymphocytes in tested mice by colchincine treatment (3 mg/kg, intraperitoneal injection).
Metaphase spreads were prepared from either cultured MEF cells or bone marrow lymphocytes.
The percentage of activated cells for bone marrow B lymphocytes, spleen lymphocytes, NK cells and peritoneal macrophages were notably increased after LP treatment.
Further, flow cytometry confirmed altered B lymphopoiesis, which revealed diminished B220+, CD138+, IgM+, and IgD+ lymphocytes from marrows of all outbred and congenic collagen X Tg and KO mice throughout life, with most dramatic reductions in the perinatal lethal mice (Fig. 2B and [5]).
Suggested hypotheses (Dominguez-Gerpe and Rey-Mendez 2003) include enhanced apoptosis in thymocytes, or reduced migration of precursor T lymphocytes from bone marrow to thymus.
The model is a system of nonlinear differential equations which describe the dynamics of concentrations of antibody and antigen molecules, immunocompetent B lymphocytes, and the rest blood lymphocytes, as well as the bone-marrow lymphocyte precursors.
The use of monoclonal antibodies (see below Monoclonal antibodies) to selectively remove harmful lymphocytes from the donor marrow has produced encouraging results in preventing graft-versus-host disease.
There is in fact a physiological barrier between bone marrow and blood which prevents immature lymphocytes from entering the circulation.
In addition, melatonin may also bind to high affinity receptors present on Th2 lymphocytes from human bone marrow thus increasing the levels of IL-4 [ 25], increasing the production of IL-10 and decreasing of TFN-α in mice sensitized with ovalbumin injected with complete Freund's adjuvant, activating the Th2 response [ 26].
