Abstract:
:Murine macrophages from different anatomical sites were compared for their ability to become tumoricidal and to secrete interleukin-1 (IL-1) and tumor necrosis factor (TNF) following stimulation in vitro by several biological response modifiers (BRM). Peritoneal macrophages (PM), alveolar macrophages (AM), and tumor-infiltrating-macrophages (TIM), isolated from B16F10 melanoma colonies in the lung, were incubated overnight with BRM [recombinant murine interferon gamma (rMulFN-gamma), lipopolysaccharide (LPS), muramyl dipeptide (MDP)], either alone or in combination. PM exhibited an increased cytotoxic response following incubation with LPS or rMuIFN-gamma but not with MDP. Both AM and TIM were induced to become tumoricidal following incubation with rMuIFN-gamma plus LPS or rMuIFN-gamma plus MDP but not after stimulation with any BRM alone; the level of cytotoxicity obtained with TIM incubated with rMuIFN-gamma plus LPS was slightly lower than that observed with PM or AM, while with rMuIFN-gamma plus MDP both AM and TIM had lower cytotoxicity than PM. Secretion of IL-I and TNF was observed in PM stimulated with LPS or MDP but not with rMuIFN-gamma. Likewise, secretion of IL-I by AM or TIM was also induced with LPS, although less than that obtained with PM. AM stimulated with LPS secreted larger amounts of TNF than PM while TIM secreted very low amounts of TNF. However, this result may be a consequence of the enzymatic isolation procedure used to obtain TIM since TNF secretion was also impaired in LPS-stimulated normal lung macrophages isolated by a similar enzymatic procedure, or enzyme-treated PM. Our results suggest that TIM obtained from lung metastases share certain functional characteristics with normal AM and respond to BRM in like manner with respect to induction of tumoricidal activity and cytokine secretion.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Brunda MJ,Sulich V,Wright RB,Palleroni AVdoi
10.1002/ijc.2910480513subject
Has Abstractpub_date
1991-07-09 00:00:00pages
704-8issue
5eissn
0020-7136issn
1097-0215journal_volume
48pub_type
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journal_title:International journal of cancer
pub_type: 杂志文章,多中心研究
doi:10.1002/ijc.2910630109
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abstract::Gene silencing by DNA hypermethylation of CpG islands is a well-characterized phenomenon in cancer. The effect of hypomethylation in particular of non-CpG island genes is much less well described. By genome-wide screening, we identified 105 genes in microsatellite stable (MSS) colorectal adenocarcinomas with an invers...
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journal_title:International journal of cancer
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pub_type: 杂志文章,随机对照试验
doi:10.1002/ijc.30127
更新日期:2016-08-15 00:00:00
abstract::Gene therapy and virotherapy are among the approaches currently being used to treat lung cancer. The success of cancer gene therapy depends on treatments where different types of tumors can be selectively targeted and destroyed without affecting normal cells and tissue. Previously, we described a promoter system (TTS)...
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