Abstract:
:Mast cells are not only the primary effector cells of immediate type immune reactions, but they have recently also been considered to contribute to the induction of an immune response. Data on the ability of the cells to express major histocompatibility complex (MHC) antigens and the mechanisms involved are however controversial or unclear. We have therefore studied the expression of MHCI and the induction of MHCII molecules on leukemic HMC-1 mast cells by immunohistochemistry. Cells were incubated for up to 72 h in the presence of IFN gamma, TNF alpha and IL-4, and immunohistochemical staining was done with monoclonal antibodies with specificity for HLA class I heavy chain, HLA-DQ (Tü22), HLA-DR (Tü36) and HLA-DQ, -R and -P (Tü35). All unstimulated mast cells expressed MHC class I, but almost no class II antigens. Incubation with IFN gamma caused a rapid, dose-dependent induction of MHC class II molecules, with Tü35 staining maximally one third of the cells within 24 h at the highest dose tested (100 IU/ml), with decline on extended culture. TNF alpha (2 ng/ml) was less effective but caused more persistent induction with time. IL-4 (200 ng/ml) had hardly any effects at all. Staining with Tü22 and Tü36 was always lower than with Tü35, and additive or even synergistic results were obtained when cells were stimulated with a combination of IFN gamma and TNF alpha. These findings support the concept that mast cells can facultatively participate in immune recognition processes depending on the type of pathological conditions in their microenvironment which allow expression of MHC class II molecules.
journal_name
J Dermatol Scijournal_title
Journal of dermatological scienceauthors
Grabbe J,Karau L,Welker P,Ziegler A,Henz BMdoi
10.1016/s0923-1811(97)00033-9subject
Has Abstractpub_date
1997-11-01 00:00:00pages
67-73issue
1eissn
0923-1811issn
1873-569Xpii
S0923-1811(97)00033-9journal_volume
16pub_type
杂志文章abstract:BACKGROUND:Melanin for skin pigmentation is synthesized from tyrosine via an enzymatic cascade that is controlled by tyrosinase (TYR), tyrosinase-related protein 1 (TRP1), and dopachrome tautomerase/tyrosinase related protein 2 (Dct/TRP2), which are the targets of microphthalmia-associated transcription factor (MITF). ...
journal_title:Journal of dermatological science
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更新日期:2013-12-01 00:00:00
abstract:BACKGROUND:The transcription factor Sox9 is pivotal in the morphogenesis of hair follicles, but its role in sebocytes is poorly understood. OBJECTIVE:We investigated the effect of Sox9 on human sebocyte proliferation, differentiation and lipogenesis. METHODS:Sox9 expression was detected by immunohistochemistry in nor...
journal_title:Journal of dermatological science
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journal_title:Journal of dermatological science
pub_type: 杂志文章,评审
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:Netherton syndrome (NS, MIM 256500) is a potential live threatening autosomal-recessive skin disorder clinically characterized by the trias of congenital erythroderma, hair shaft anomalies and atopic diathesis. It is caused by mutations in the gene SPINK5 resulting in a deficiency of its processed protein na...
journal_title:Journal of dermatological science
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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journal_title:Journal of dermatological science
pub_type: 杂志文章
doi:10.1016/j.jdermsci.2018.05.009
更新日期:2018-09-01 00:00:00
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更新日期:1993-04-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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abstract::In order to know the possible effects of gastrin releasing peptide (GRP) on nevus cells and melanocytes, we studied the effect of GRP on the proliferation of cultured human nevus cells and normal melanocytes. MTS assay showed that GRP stimulated the growth of viable melanocytes at 1000 ng/ml. GRP also stimulated the g...
journal_title:Journal of dermatological science
pub_type: 杂志文章
doi:10.1016/s0923-1811(97)00079-0
更新日期:1998-06-01 00:00:00
abstract:BACKGROUND:Tyrosinase, the rate-limiting enzyme required for melanin production, has been targeted to develop active brightening/lightening materials for skin products. Unexpected depigmentation of the skin characterized with the diverse symptoms was reported in some subjects who used a tyrosinase-competitive inhibitin...
journal_title:Journal of dermatological science
pub_type: 杂志文章
doi:10.1016/j.jdermsci.2014.07.001
更新日期:2014-10-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章,评审
doi:10.1016/j.jdermsci.2006.12.002
更新日期:2007-05-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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更新日期:1991-03-01 00:00:00
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journal_title:Journal of dermatological science
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更新日期:2013-09-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章
doi:10.1016/j.jdermsci.2010.05.004
更新日期:2010-08-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章,评审
doi:10.1016/j.jdermsci.2008.06.003
更新日期:2008-12-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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journal_title:Journal of dermatological science
pub_type: 杂志文章
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journal_title:Journal of dermatological science
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journal_title:Journal of dermatological science
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abstract:BACKGROUND:We sometimes encounter difficulties in assessing the severity of pediatric atopic dermatitis (AD) using currently available biomarkers such as thymus and activation-regulated chemokine (TARC) due to the higher baseline values in non-AD children. Recent case control studies have indicated the usefulness of sq...
journal_title:Journal of dermatological science
pub_type: 杂志文章
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abstract::Systemic sclerosis (SSc) is a connective tissue disease with unknown etiology characterized by excessive deposition of collagen in the skin as well as various internal organs. One of the characteristic histological features is the presence of infiltrating mononuclear cells in the dermis in its early stage. As well as ...
journal_title:Journal of dermatological science
pub_type: 杂志文章
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journal_title:Journal of dermatological science
pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2011-09-01 00:00:00
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journal_title:Journal of dermatological science
pub_type: 杂志文章,评审
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abstract::Telomerase is a ribonucleoprotein enzyme that catalyses the addition of telomeric repeats to telomeres. Since the shortening of telomeres is thought to act as a mitotic clock, activation of telomerase is crucial for the continued growth of cancer cells. Telomerase is frequently activated in premalignant and malignant ...
journal_title:Journal of dermatological science
pub_type: 杂志文章,评审
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更新日期:2000-03-01 00:00:00
abstract::Crude enzyme solutions of prolidase were extracted from cultured human skin fibroblasts derived from control and prolidase-deficient sisters. Two forms of prolidases (prolidase-I and II) were partially purified by high performance liquid chromatography equipped with an ion exchange column. On gel filtration, the relat...
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pub_type: 杂志文章
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更新日期:1990-09-01 00:00:00