Abstract：
:Aminopeptidase N (APN)/CD13 is a membrane-bound surface ectopeptidase with a ubiquitous distribution. In hematopoiesis, APN/CD13 is expressed on stem cells and during most developmental stages of myeloid cells. Because APN/CD13 has been implicated in the trimming on the cell surface of peptides that protrude out of MHC class II molecules, we wanted to study the regulation of this membrane peptidase in antigen presenting cells by TGF-beta. TGF-beta is a potent inducer of the maturation of monocyte precursors towards a macrophage phenotype. Using competitive RT-PCR and cytofluorimetric analyses, we quantified the modulation of the APN/CD13 mRNA as well as protein expression by TGF-beta 1 and -2 and found a stimulation of the APN/CD13 expression in a time- and dose-dependent manner in monocytic cells. In U937 cells, the time course showed a maximum for APN/CD13 mRNA at 24 hours incubation with TGF-beta. In experiments with actinomycin D- treated cells was found a stabilization of APN/CD13 mRNA by TGF-beta 1. Contrary to the IL-4-induced expression of APN/CD13 as well as of MHC class II in monocytic cells, we could show that TGF-beta is able to augment the APN/CD13 expression but decreases the MHC class II expression.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Kehlen A,Langner J,Riemann Ddoi
10.1007/0-306-46826-3_5subject
Has Abstractpub_date
2000-01-01 00:00:00pages
49-56eissn
0065-2598issn
2214-8019journal_volume
477pub_type
杂志文章abstract：:Evidence continues to accumulate that strengthens the proposal of heterogeneity within both the AT1 and the AT2 receptor subtypes. Pharmacologic, biochemical and immunological studies of AT2 receptors expressed in N1E-115 cells strengthen the hypothesis of AT2 receptor heterogeneity. However, it is important to reasse...
journal_title：Advances in experimental medicine and biology
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更新日期：1983-01-01 00:00:00
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更新日期：2015-01-01 00:00:00
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更新日期：2017-01-01 00:00:00
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pub_type： 杂志文章,评审
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更新日期：2013-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-981-15-8763-4_7
更新日期：2021-01-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/978-1-4615-9140-5_25
更新日期：1980-01-01 00:00:00
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更新日期：2018-01-01 00:00:00
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pub_type： 临床试验,杂志文章
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更新日期：2013-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：
更新日期：2000-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3282-4_39
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pub_type： 杂志文章,评审
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更新日期：2008-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1979-01-01 00:00:00
abstract：:There is a considerable body of evidence indicating that oxidative stress is a causal factor both in lipofuscinogenesis as well as in aging. Studies on the effects of pro-oxidants and antioxidants on lipofuscin accumulation in cultured rat cardiac myocytes and human glial cells indicated that pro-oxidants accelerate w...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4899-5339-1_2
更新日期：1989-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
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更新日期：1995-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
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更新日期：2017-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-69116-9_3
更新日期：2007-01-01 00:00:00
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journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
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更新日期：2019-01-01 00:00:00
