2001
DOI: 10.4049/jimmunol.166.11.6545
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Molecular Identification of IgE-Dependent Histamine-Releasing Factor as a B Cell Growth Factor

Abstract: The culture supernatants of LK1 cells, murine erythroleukemia cells, showed B cell-stimulating activity. Purification and NH2-terminal sequence analysis revealed that one of the candidates was murine IgE-dependent histamine-releasing factor (IgE-HRF), which is known to induce histamine from basophils. Recombinant IgE-HRF (rHRF) obtained from Escherichia coli- or 293-transformed embryonal kidney cells was tested for B cell-stimulating activity. Both rHRFs stimulated B cell proliferation in a dose-dependent mann… Show more

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Cited by 71 publications
(46 citation statements)
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References 34 publications
(40 reference statements)
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“…An example included IgE-dependent histamine-releasing factor, a B cell growth factor and basophil activator. This basophil activator is expressed in myeloid cells and is involved in delayed-type allergic responses (39). Connexin 43, the most abundant of all SAGE tags in this study, may also indicate a connection with macrophages, since activated macrophages express this gap junction protein (40).…”
Section: Discussionmentioning
confidence: 99%
“…An example included IgE-dependent histamine-releasing factor, a B cell growth factor and basophil activator. This basophil activator is expressed in myeloid cells and is involved in delayed-type allergic responses (39). Connexin 43, the most abundant of all SAGE tags in this study, may also indicate a connection with macrophages, since activated macrophages express this gap junction protein (40).…”
Section: Discussionmentioning
confidence: 99%
“…TCTP has been shown to trigger the release of histamine from eosinophils, basophils, and mast cells and was also found to be a potent stimulus for interleukin-4 and interleukin-8 production (19,20). In addition, TCTP was shown to have a B-cell stimulating activity (21). Under allergic conditions, TCTP was detected in nasal and skin blister fluids from patients with late phase allergic inflammation (22) and in bronchoalveolar lavages from patients with idiopathic eosinophilic pneumonia (23).…”
Section: Tsap6mentioning
confidence: 99%
“…The high levels of constitutive secretion of endogenous TCTP and the low transfection efficiency obtained may account for the absence of augmented secretion of endogenous TCTP by TSAP6 in this cell line. Finally, as TCTP was originally identified as a secreted factor in hematopoietic cells (18,21), we addressed whether overexpression of TSAP6 could enhance the secretion of TCTP in the erythroleukemia cell line K562. Similar to the effects observed in 293T cells, overexpression of HA-TSAP6 increased the levels of both endogenous and exogenous TCTP in the supernatants of K562 cells (Fig.…”
Section: Tsap6 Facilitates the Secretion Of Tctp 46108mentioning
confidence: 99%
“…More recently, a protein with B cell stimulatory activity isolated from the culture supernatants of the murine erythroleukemia cell line LK1 was identified as murine TCTP/HRF (9). Incubation of murine splenic B cells with cloned recombinant murine HRF (mHRF) was found to stimulate proliferation, increase MHC class II expression, and up-regulate the message for the cytokines IL-1, IL-6, and IL-10.…”
Section: Inhibition Of Cytokine Gene Transcription By the Human Recommentioning
confidence: 99%
“…To investigate the in vivo effects of mHRF on B cell function, BALB/c mice were injected i.m. with mHRF, and the effects on B cell Ig production and proliferation were investigated (9). Mice injected with mHRF demonstrated increased serum Ig production as well as enhanced proliferation and Ig production of their anti-CD40-stimulated B cells.…”
Section: Inhibition Of Cytokine Gene Transcription By the Human Recommentioning
confidence: 99%