Abstract：
:The human monocyte-like cell line, U-937, was shown to synthesize and secrete C3 by hemolytic assays, radioimmunoassays and metabolic labeling experiments. The daily synthesis of antigenic C3 by unstimulated U-937 cells was low (about 3 ng/10(6) cells/24 hr) over a 3 day period. Induction of the cells to differentiate into macrophage-like cells with phorbol myristate acetate (PMA), resulted in 5-fold augmentation of C3 synthesis and secretion into the culture medium. Using a plaque assay for enumerating C3 production by single cells, approx. 5% of unstimulated U-937 cells were found to secrete hemolytically active C3. The proportion of C3-plaque forming cells was increased about 6-fold in PMA stimulated cells. The synthesis of C3 by U-937 cells was reversibly inhibited by cycloheximide. Data from SDS-PAGE analyses showed that U-937 cells synthesized C3 as a precursor polypeptide chain and was capable of processing this pro-molecule into the secreted two chain form. C3 antigen immunoprecipitated from stimulated U-937 cell lysates showed an increased amount of low mol. wt material as compared to C3 antigen immunoprecipitated from the lysates of unstimulated cells. This may be attributable to increased intracellular proteolytic activity in the PMA stimulated cells. The studies show that the U-937 cell line provides a useful model for studies on the synthesis and processing of complement proteins and the physiological regulation of complement production.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Minta JO,Isenman DEdoi
10.1016/0161-5890(87)90079-4subject
Has Abstractpub_date
1987-10-01 00:00:00pages
1105-11issue
10eissn
0161-5890issn
1872-9142journal_volume
24pub_type
杂志文章abstract：:Chemokines are key regulators of migration and consequent activation of migrating leukocytes. CC chemokines constitute the largest chemokine group with 24-28 members in mammalian species, and even more in teleost fish, with up to 81 members in zebrafish Danio rerio. Further studies concerning fish chemokine genes will...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2009.12.014
更新日期：2010-03-01 00:00:00
abstract：:The functional importance of each amino acid residue making up the antigenic determinants of three different peptide-mAb interactions was determined using complete series of substitution analogs of the three immunizing synthetic peptides. Fingerprint substitution profiles for the three different antigenic determinants...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(93)90032-7
更新日期：1993-04-01 00:00:00
abstract：:Trichosanthin (TCS) is a type I ribosome-inactivating protein with wide spectrum of pharmacological activities. It inhibits human immunodeficiency virus type 1 (HIV-1) and Herpes simplex virus type 1 (HSV-1) replication but the mechanism is not clear. From a previous study, TCS was found to be more cytotoxic to HIV-1 ...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2011.06.217
更新日期：2011-09-01 00:00:00
abstract：:DC-SIGN (dendritic cell-specific ICAM-3-grabbing non-integrin) is a myeloid pathogen-attachment factor C-type lectin which recognizes mannose- and fucose-containing oligosaccharide ligands on clinically relevant pathogens. Intracellular signaling initiated upon ligand engagement of DC-SIGN interferes with TLR-initiate...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2009.09.036
更新日期：2010-01-01 00:00:00
abstract：:Naturally developing human antibodies to the Epstein-Barr nuclear antigen recognize synthetic peptides containing sequences from the unusual glycine-alanine region of this protein. We tested antibody binding to a series of peptides of from five to 20 amino acids in length. Peptides as small as seven amino acids could ...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(84)90114-7
更新日期：1984-11-01 00:00:00
abstract：OBJECTIVE:Using multiplex microarray-based component resolved diagnosis (CRD) to investigate the allergen sensitization profile of allergic asthma patients in southern China. METHOD:Serum samples from 57 polysensitized mite allergic asthmatic patients in a tertiary referral centre of southern China were tested with mu...
journal_title：Molecular immunology
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.molimm.2018.11.004
更新日期：2019-01-01 00:00:00
abstract：:Peptide binding to major histocompatibility complex (MHC) class II molecules is optimal at mildly acidic pH. X-ray crystal structures solved for the murine class II molecule I-E(k) revealed an interesting localization of negatively charged residues within the P6 pocket, which may have implications in the pH dependency...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/s0161-5890(02)00010-x
更新日期：2002-06-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(89)90101-6
更新日期：1989-02-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2005.10.020
更新日期：2006-04-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2015.01.023
更新日期：2015-05-01 00:00:00
abstract：:MTX is an effective therapy for autoimmune-inflammatory diseases. The mechanisms that mediate these actions are not completely clear. It is accepted that many of these effects are mediated through the release of adenosine with the activation of the adenosine receptor A2. MTX is used as a steroid sparing agent. An impr...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2006.07.303
更新日期：2007-03-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(82)90195-x
更新日期：1982-11-01 00:00:00
abstract：:Prolactin has several immune functions in fish however, the effects on innate and specific components of rainbow trout immunity are currently unknown. Therefore in this study, prolactin peptide (pPRL) injection in rainbow trout generated anti-PRL antibodies that were confirmed through Western blot assays of fish brain...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2020.08.020
更新日期：2020-11-01 00:00:00
abstract：:A 30,000 mol. wt component (beta) is associated in a 1:1 ratio with the 50,000 mol. wt glycoprotein (alpha) which binds immunoglobulin E (IgE) on mast cells and related tumor cells. We show that alpha and beta are associated in membrane preparations. This is consistent with previous results which showed labeling of be...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(82)90334-0
更新日期：1982-02-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/s0161-5890(02)00019-6
更新日期：2002-05-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2005.02.014
更新日期：2006-02-01 00:00:00
abstract：:Helminths, as well as their secretory/excretory products, induce a tolerogenic immune microenvironment. High molecular weight components (PI) from Ascaris suum extract down-modulate the immune response against ovalbumin (OVA). The PI exerts direct effect on dendritic cells (DCs) independent of TLR 2, 4 and MyD88 molec...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2017.03.015
更新日期：2017-07-01 00:00:00
abstract：:The Pms2 gene is involved in DNA mismatch repair in mammalian cells, and has recently been shown to affect hypermutation of mammalian immunoglobulin genes. We have studied hypermutation of a lambda1 transgene in chronically stimulated Peyer's patch B cells of both young and old mice deficient in function of Pms2. In y...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/s0161-5890(99)00027-9
更新日期：1999-02-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2019.04.026
更新日期：2019-08-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2009.01.003
更新日期：2009-04-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(92)90120-m
更新日期：1992-07-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2018.04.011
更新日期：2018-07-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2006.03.002
更新日期：2007-01-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章,评审
doi：10.1016/j.molimm.2003.11.029
更新日期：2004-02-01 00:00:00
abstract：:Induction of the TCR signaling pathway terminates the expression of RAG genes, and a link between this pathway and their transcriptional control is evident from the recent demonstration of their re-expression if the TCR is subsequently lost or down-regulated. Since unstimulated T cells display a steady-state level of ...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2011.02.015
更新日期：2011-07-01 00:00:00
abstract：:Abs reactive to DNA and DNA/histone complexes are a distinguished characteristic of primary immunoglobulin repertoires in autoimmune B6.MRL-Faslpr and MRL/MpJ-Faslpr mice. These mice are defective in Fas receptor, which is critical for the apoptosis of autoreactive B cells by an extrinsic pathway. In the present study...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2016.09.006
更新日期：2016-10-01 00:00:00
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journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/j.molimm.2007.03.013
更新日期：2007-07-01 00:00:00
abstract：:The antigenic structural features of alpha-lactalbumin have been investigated using a radioimmunoassay, peptide inhibition of the quantitative precipitin reaction, and by immunodiffusion analysis after chemical modification of the molecule. Antigenic activity (in rabbits) was localized to several peptic fragments and ...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(82)90192-4
更新日期：1982-11-01 00:00:00
abstract：:A relatively large number of variable region genes (V) contribute, via gene rearrangements with smaller numbers of additional gene elements (D and J), to generate diversity in the immune response. While some VH gene families are thought to contain 100- 1000 members, the VH10 family has only two known functioning membe...
journal_title：Molecular immunology
pub_type： 杂志文章
doi：10.1016/0161-5890(92)90032-s
更新日期：1992-03-01 00:00:00
abstract：:BST-2 (also known as tetherin, CD317, or HM1.24) was first described as a potent interferon-inducible host antiviral factor nearly five years ago. Since that time, numerous reports have been published regarding the antiviral activity and immunological properties of this protein. BST-2 blocks viral replication by inhib...
journal_title：Molecular immunology
pub_type： 杂志文章,评审
doi：10.1016/j.molimm.2012.11.008
更新日期：2013-06-01 00:00:00
