Magic™ Anti-IgD polyclonal antibody (DPAB2831)


Host Species
Species Reactivity
IGHD isolated from human serum pool.


Alternative Names
IGHD; immunoglobulin heavy constant delta; IgD
Entrez Gene ID


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Molecular analysis of immunoglobulin genes reveals frequent clonal relatedness in double monoclonal gammopathies


Authors: Tschumper, R. C.; Dispenzieri, A.; Abraham, R. S.; Henderson, K. J.; Jelinek, D. F.

Monoclonal gammopathies (MGs) are hematological diseases characterized by high levels of a monoclonal immunoglobulin (Ig) or M-protein. Within this group are patients with more than one M-protein, referred to as double MGs (DMGs). The M-proteins in DMG patients may have different heavy chain (HC) isotypes that are associated with different light chains (LCs), or different HCs that are LC matched. In this study, we examined the clonal relatedness of the M-proteins in the latter type in a cohort of 14 DMG patients. By using PCR, we identified 7/14 DMG patients that expressed two Ig HC isotypes with identical Ig HC variable (IGHV), diversity (IGHD), joining (IGHJ), and complementarity determining region (HCDR3) sequences. Two additional DMG patients had two Ig transcripts using the same IGHV, IGHD and IGHJ genes but with slight differences in variable region or HCDR3 mutations. LC analysis confirmed that a single LC was expressed in 3/7 DMG patients with identical HC transcripts and in the two DMGs with highly similar transcripts. The PCR findings were confirmed by immunofluorescence for HC and LC expression. Clonally related HC-dissimilar/LC-matched DMGs may occur often and defines a new subtype of MG that may serve as a tool for studies of disease pathogenesis. Blood Cancer Journal (2013) 3, e112; doi:10.1038/bcj.2013.12; published online 19 April 2013

Is growth hormone treatment in children associated with weight gain? - Longitudinal analysis of KIGS data


Authors: Reinehr, Thomas; Lindberg, Anders; Koltowska-Haggstrom, Maria; Ranke, Michael

ObjectiveGrowth hormone (GH) increases lean body mass and reduces fat mass. However, the long-term changes in weight status during growth hormone treatment, according to age and weight status at onset of treatment, have not previously been reported in large data sets. MethodsChanges in BMI-SDS between starting GH treatment and attaining near adult height (NAH) were analysed in 2643 children with idiopathic GH deficiency (IGHD), 281 children small for gestational age (SGA), 1661 girls with Turner syndrome (TS), and 142 children with Prader-Willi syndrome (PWS) in the KIGS database. ResultsBMI-SDS increased significantly between onset of GH treatment and NAH (IGHD:+029, SGA:+069, TS:+048) except in PWS (-002). These increases were greater in children with younger age at onset of GH treatment (significant in all indications) and with lower doses of GH treatment (significant in IGHD & TS) in multiple linear regression analyses also including gender, duration of GH treatment, BMI-SDS and height-SDS at onset of treatment, and birth weight-SDS. Obese children at onset of GH treatment decreased their BMI-SDS, while underweight and normal weight children at onset of GH treatment increased their BMI-SDS independently of GH treatment indication. ConclusionsLong-term GH treatment was associated with changes in weight status, which were beneficial for underweight and obese children independent of the indication for GH. However, the increase in BMI-SDS in normal weight children treated with GH needs to be investigated in future prospective longitudinal studies to analyse whether this represents an increase of fat mass, lean body mass or both.

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