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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Idiopathic paraproteinaemia. IV. The role of genetic factors in the development of monoclonal B cell proliferative disorders--a study in the ageing C57BL/KaLwRij and CBA/BrARij mouse radiation chimeras.

Mouse radiation chimeras, employing strains with a low (CBA/BrARij) and a high (C57BL/KaLwRij) frequency of idiopathic paraproteinaemia (IP), were used in a study on genetic influences in the development of IP, a benign B cell monoclonal proliferative disorder. Taking advantage of the different Igh1 allotypic markers between the two strains, the development of IP with increasing age was investigated by agar electrophoresis, immunoelectrophoresis and immunofixation. Four of 18 CBA recipients transplanted with C57BL bone marrow cells were shown to develop IP of the IgG2a isotype and the Igh1b (donor) allotype during their life. In contrast, none of the 23 C57BL recipients of CBA bone marrow developed an IgG2a paraprotein of the Igh1a allotype. However, in three of these 23 chimeras, an IgG2a and Igh1b (recipient) allotype paraprotein appeared with age; two of these mice proved to be reversals at 12 months and one at 15 months of age. The frequencies of homogeneous immunoglobulins of the donor type in the chimeras corresponded roughly to those of normal mice of the donor strain. Histopathological examination excluded a malignant origin of these monoclonal proliferations. These findings support the view that intrinsic cellular genetic factors are of major importance in the development of IP, a benign B cell neoplasia.[1]


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