Abstract:
BACKGROUND:The expression of major histocompatibility complex class II (MHCII) antigens in both mouse and human tumors is rare, and these antigens are not easily inducible by IFN-gamma (IFNg). Since MHCII may play an important role in the development of host antitumor immune response, we explored the possibility of restoring MHCII inducibility in several IFNg-resistant tumor cell lines using protein kinase C (PKC) agonists phorbol myristate acetate (PMA) or Bryostatin. RESULTS:Tumor cells were co-cultured with various concentrations of PMA and IFNg for 48 hr. The expression of MHCII antigens and receptors IFNgR1 and IFNgR2 was determined by flow cytometry. We showed that the presence of as little as 0.1 ng/ml of PMA in tissue culture restored the ability of weakly inducible LS1034 colon carcinoma cells to express MHCII in response to IFNg (100 - 10,000 IU/ml) in a dose-dependent manner. Likewise, Bryostatin 1, as low as 10 ng/ml produced a 5-6 fold upregulation of MHCII. The effect of PMA was not observed in two other poorly responding cell lines, MSTO-211H mesothelioma and HepG2 hepatocellular carcinoma, and was abrogated by relatively high concentrations of PKC inhibitors staurosporine (100 nM) and GF 109203X (1,000 nM). Both surface and intracellular staining of all cell lines with antibodies against IFNgR1 and IFNgR2 failed to detect any increase in IFNg receptor expression following incubation with PMA. CONCLUSION:In this study we showed that IFNg-inducibility of MHCII antigens in weakly inducible LS1034 colorectal carcinoma cell line can be rescued by concomitant incubation with PKC agonists. Bryostatin 1 may be considered for further investigation of IFNg-dependent MHCII induction in resistant tumors in vivo.
journal_name
Cancer Cell Intjournal_title
Cancer cell internationalauthors
Kudinov Y,Wiseman CL,Kharazi AIdoi
10.1186/1475-2867-3-4keywords:
subject
Has Abstractpub_date
2003-03-25 00:00:00pages
4issn
1475-2867journal_volume
3pub_type
杂志文章abstract:Background:Melanoma is the most aggressive type of skin cancer with high mortality rate and poor prognosis. lncRNA MEG3, a tumor suppressor, is closely related to the development of various cancers. However, the role of lncRNA MEG3 in melanoma has seldom been studied. Methods:RT-PCR was used to examine the expressions...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-1087-4
更新日期:2020-01-10 00:00:00
abstract:Background:Long non-coding RNAs (lncRNAs) play significant roles in tumorigenesis and can contribute to identification of novel therapeutic targets for cancers. This paper was aimed at exploring the role of CTBP1 divergent transcript (CTBP1-AS2) in cervical cancer (CC) progression. Methods:qRT-PCR and western blot ass...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-01430-5
更新日期:2020-07-28 00:00:00
abstract::Osteosarcoma (OS) is one of the most prevalent malignant cancers with lower survival and poor overall prognosis mainly in children and adolescents. Identifying the molecular mechanisms and OS stem cells (OSCs) as new concepts involved in disease pathogenesis and progression may potentially lead to new therapeutic targ...
journal_title:Cancer cell international
pub_type: 杂志文章,评审
doi:10.1186/s12935-018-0654-4
更新日期:2018-10-16 00:00:00
abstract:Background:Cancer-associated fibroblasts (CAFs) play important roles in tumor progression. However, the behaviors of activated CAFs in gastric cancer remain to be determined. The aim of the present study was to investigate the correlations between activated gastric CAFs and the prognosis of patients with gastric cancer...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-018-0599-7
更新日期:2018-07-20 00:00:00
abstract::Prostate cancer is a gland tumor in the male reproductive system. It is a multifaceted and genomically complex disease. Transmembrane protease, serine 2 and v-ets erythroblastosis virus E26 homolog (TMPRSS2-ERG) gene fusions are the common molecular signature of prostate cancer. Although tremendous advances have been ...
journal_title:Cancer cell international
pub_type: 杂志文章,评审
doi:10.1186/1475-2867-14-34
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0860-8
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-018-0542-y
更新日期:2018-04-03 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-015-0215-z
更新日期:2015-06-20 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0822-1
更新日期:2019-04-16 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0973-0
更新日期:2019-10-01 00:00:00
abstract:BACKGROUND:Castration-resistance in prostate cancer (PC) is a critical event hallmarking a switch to a more aggressive phenotype. Neuroendocrine differentiation and upregulation of NFκB transcriptional activity are two mechanisms that have been independently linked to this process. METHODS:We investigated these two pa...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/1475-2867-11-13
更新日期:2011-05-15 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-017-0399-5
更新日期:2017-02-13 00:00:00
abstract:Objective:This study aimed to investigate the relationship among miR-145-5p, ANGPT2 and the NOD_LIKE_RECEPTOR pathway, thereby revealing the molecular mechanism of these three factors underlying the proliferation, migration and invasion of gastric cancer (GC) epithelial cells. Methods:qRT-PCR was carried out to detect...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-01483-6
更新日期:2020-08-28 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-018-0628-6
更新日期:2018-09-03 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-01616-x
更新日期:2020-10-29 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-1157-7
更新日期:2020-04-03 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-018-0712-y
更新日期:2018-12-27 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-1069-6
更新日期:2019-12-21 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0831-0
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0827-9
更新日期:2019-04-23 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0840-z
更新日期:2019-05-06 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/1475-2867-12-20
更新日期:2012-05-28 00:00:00
abstract:Background:To investigate the expression of RASSF-1A in oral squamous cell carcinoma (OSCC) and adjacent tissues, and to explore its mechanism of action in the development of OSCC. Methods:RASSF-1A and proliferation-related protein expression in clinical and OSCC mouse models were detected by qPCR and western blot. In...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-019-0932-9
更新日期:2019-08-13 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-01474-7
更新日期:2020-08-08 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-017-0383-0
更新日期:2017-01-25 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章,评审
doi:10.1186/s12935-020-01535-x
更新日期:2020-09-15 00:00:00
abstract::[This retracts the article DOI: 10.1186/s12935-015-0237-6.]. ...
journal_title:Cancer cell international
pub_type: 撤回出版物
doi:10.1186/s12935-016-0359-5
更新日期:2016-11-04 00:00:00
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journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-014-0133-5
更新日期:2014-11-30 00:00:00
abstract:BACKGROUND:Chemoresistance is a major obstacle to successful chemotherapy for colorectal cancer. Eukaryotic translation initiation factor 5A2 (eIF5A2), one of the two isoforms in the eIF5A family, has been reported to be a new oncogene in many types of human cancer. In the present study, we aimed to investigate whether...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-015-0250-9
更新日期:2015-11-17 00:00:00
abstract:BACKGROUND:LncRNA HOXA-AS2 has been found in the literature to deteriorate glioblastoma. However, its regulatory mechanism is yet to be fully investigated. Our study focused chiefly on the interaction and role of the HOXA-AS2/miR-885-5p/RBBP4 axis in the development of glioblastoma. METHODS:qRT-PCR analysis was perfor...
journal_title:Cancer cell international
pub_type: 杂志文章
doi:10.1186/s12935-020-01690-1
更新日期:2021-01-11 00:00:00