Abstract:
:Cell free extracts from metastases of human melanoma contain a highly active ribonucleoside diphosphate reductase (RR) which uses guanosine diphosphate (GDP) as substrate and deoxythymidine triphosphate (dTTP) as effector. No activity could be detected in these extracts when cytidine diphosphate (CDP) was used as the substrate with adenosine triphosphate (ATP) as effector. The activity of this RR required the presence of either magnesium or calcium: there was a time lag before cell extracts from melanotic melanoma metastases showed full activities, but extracts from amelanotic tumors showed normal kinetics in the presence of these divalent cations. By contrast to other RRs, the activities in cell-free extracts could not be inhibited by hydroxyurea (10(-2) M). Even though an activity related free radical could be detected by electron paramagnetic resonance spectroscopy at 77 degrees K, the signal could not be quenched by 10(-2) M of this free radical trap. However, after ammonium sulphate fractionation, enzyme activity from melanotic melanoma was inhibited by 66% in 1 h. In the presence of substrates, effector and cofactors, the radical signal at g = 2.009 was also quenched by 60%; in the absence of substrate, effectors and cofactors, this signal was unaffected. These results indicate that two different free radicals must be present on melanoma RR. One is present in the resting enzyme, and the other is used during catalytic activity. The thiolate-active site of RR from melanoma was inhibited by the new nitrosourea anti-tumour drug fotemustine (IC50 = 10(-4) M as determined from a dose-response study).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Melanoma Resjournal_title
Melanoma researchauthors
Schallreuter KU,Elgren TE,Nelson LS Jr,MacFarlan S,Yan-Sze I,Hogenkamp HPdoi
10.1097/00008390-199212000-00014subject
Has Abstractpub_date
1992-12-01 00:00:00pages
393-400issue
5-6eissn
0960-8931issn
1473-5636journal_volume
2pub_type
杂志文章abstract::Little is known on whether melanocortin 1 receptor (MC1R) associated cutaneous melanoma (CM) risk varies depending on histological subtype and body site, and whether tumour thickness at diagnosis (the most important prognostic factor for CM patients) differs between MC1R variant carriers and wild-type individuals. We ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000668
更新日期:2020-10-01 00:00:00
abstract::We studied the efficacy, tolerability and clinical courses of dabrafenib in patients with metastatic melanoma who were ineligible for enrolment into a clinical trial. Between July 2011 and May 2013, patients with unresectable stage III or stage IV, V600-mutated metastatic melanoma who were not eligible for inclusion i...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000036
更新日期:2014-04-01 00:00:00
abstract::Patients with melanoma may experience a variety of different vision symptoms, in part associated with melanoma-associated retinopathy. For several melanoma patients with or without melanoma-associated retinopathy, colour vision deficiencies, especially involving the tritan system, have been reported. The frequency of ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/01.cmr.0000222599.35062.84
更新日期:2006-10-01 00:00:00
abstract::Radioiodinated N-(2-(diethylamino)ethyl)benzamides have recently been discovered as selective agents for melanotic melanoma and are used for scintigraphic imaging in nuclear medicine. Owing to the high binding capacity, benzamide derivatives conjugated with alkylating cytostatics were synthesized and tested for their ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-200410000-00004
更新日期:2004-10-01 00:00:00
abstract::Melanoma cells are unusual because, unlike most epithelial tumours, constitutive expression of HLA class II antigens is common. We have previously demonstrated that a peptide-specific CD4+ T-cell clone proliferates briskly in response to peptide and HLA class II expressing melanoma cell lines derived from metastases. ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199904000-00010
更新日期:1999-04-01 00:00:00
abstract::In several solid tumors, an increased stathmin expression is associated with both poor prognosis and resistance to certain chemotherapy types. However, the data regarding melanocytic lesions are very limited. The goals of our study are as follows: the assessment of stathmin expression in benign and malignant melanocyt...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000550
更新日期:2019-04-01 00:00:00
abstract::Significant advances have been made in the treatment of melanoma by targeting key cellular pathways, but additional targets are needed as many patients do not respond or relapse with resistant disease. MicroRNA-155 (MiR-155) has previously been shown to regulate melanoma cell growth and acts as a tumor suppressor. We ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000545
更新日期:2019-04-01 00:00:00
abstract::Two human melanoma tumour cell lines, one radiation resistant and one radiation sensitive, were studied for their capacity for repair of sublethal radiation damage (SLDR) and for hyperthermia inhibition of radiation damage. The most resistant cell line demonstrated a survival curve with a large shoulder and a large SL...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199406000-00003
更新日期:1994-06-01 00:00:00
abstract::Occasional reports indicated cytokeratin (CK) protein expression (mainly by immunohistochemistry) in malignant melanoma (MM) and suggested an association with unfavorable clinical parameters. However, the mRNA expression of CK and its clinicopathologic significance in MM has not been specifically evaluated. We investi...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0b013e3283252feb
更新日期:2009-04-01 00:00:00
abstract::We assessed the risk of cutaneous malignant melanoma associated with the presence of ovulatory abnormalities and with the use of ovulation-inducing agents (such as clomiphene citrate) in a cohort of 3,837 women evaluated at infertility clinics in Seattle, WA, between 1974 and 1985. Computer linkage with a population-b...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199504000-00009
更新日期:1995-04-01 00:00:00
abstract::The aim of this study was to determine the apoptotic effects, toxicity, and radiosensitization of total low dose irradiation delivered at a high dose rate in vitro to melanoma cells, normal human epidermal melanocytes (HEM), or normal human dermal fibroblasts (HDF) and to study the effect of mitochondrial inhibition i...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000174
更新日期:2015-10-01 00:00:00
abstract::The objective of this study was to describe the risk factor profile of skin cancer screening participants and to determine whether there is an association between the number of skin cancer/melanoma risk factors and the likelihood of diagnosis of a malignant melanoma. Seventy skin cancer screening clinics were held by ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/01.cmr.0000205023.02527.ab
更新日期:2006-08-01 00:00:00
abstract::The mechanism of action of fotemustine, a relatively new chloroethylnitrosourea, was evaluated in human melanoma cells in order to assess its potential as an agent for hyperthermic limb perfusion. Fotemustine was more toxic to O6-alkylguanine methyl transferase (AGT) deficient (Mer-) cells than Mer+ cells, implicating...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199802000-00012
更新日期:1998-02-01 00:00:00
abstract::Radiotherapy after lymph node dissection is recommended in high-risk melanoma cases. The aim of this study is to assess whether intensity-modulated radiotherapy (IMRT) offers advantages over three-dimensional conformal radiotherapy (3DCRT) in the groin nodal basin. Fifteen consecutively treated patients (5 3DCRT and 1...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000304
更新日期:2017-02-01 00:00:00
abstract::Germline mutations determining increased cutaneous malignant melanoma (CMM) risk have been identified in familial and sporadic CMM cases, but they account only for a small proportion of CMM cases. Recent evidence suggests that germline epimutations (e.g. DNA methylation alterations), which can be inherited similarly t...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000112
更新日期:2014-10-01 00:00:00
abstract::In this study we compared the strength of the association of constitutional factors and sun exposure with cutaneous malignant melanoma (CMM) and basal cell carcinoma (BCC). We analysed 260 incident cases of CMM, 425 incident cases of BCC and two sets of population controls from previous case-control studies conducted ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199812000-00013
更新日期:1998-12-01 00:00:00
abstract::Locally advanced cutaneous melanoma has marked quality-of-life implications; however, the patient experience of symptom management and subsequent impact on quality of life has not been well described. This study aims to address the impact on patients of advanced cutaneous melanoma through qualitative interviews. Adult...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000425
更新日期:2018-04-01 00:00:00
abstract::MicroRNAs (miRNAs) are small noncoding RNA molecules involved in gene regulation. Aberrant expression of miRNA has been associated with the development or progression of several diseases, including cancer. In a previous study, we found that the expression of miRNA-125b (miR-125b) was two-fold lower in malignant melano...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0b013e328345333b
更新日期:2011-06-01 00:00:00
abstract::Selective inhibition of the mutant BRAF protein is a highly promising therapeutic approach for melanoma patients carrying the BRAF mutation. Despite the remarkable clinical response, most patients develop resistance and experience tumour regrowth. To clarify the molecular background of BRAF inhibitor resistance, we ge...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000588
更新日期:2019-08-01 00:00:00
abstract::This study examines whether 6-thioguanine resistant T cells (mutant) from metastatic melanoma patients are enriched for melanoma-associated T cells compared to T cells obtained analogously without thioguanine selection (wild-type). Melanoma-associated antigen pentamer staining was performed on 5 tumour and 9 periphera...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000625
更新日期:2020-02-01 00:00:00
abstract::Before licensing, ipilimumab was first made available to previously treated advanced melanoma patients through an expanded access programme (EAP) across Europe. We interrogated data from UK EAP patients to inform future clinical practice. Clinicians registered in the UK EAP provided anonymized patient data using a pre...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000185
更新日期:2015-10-01 00:00:00
abstract::Pelvic sentinel lymph nodes (SLNs) are commonly identified during inguinal SLN biopsy for melanoma, but retrieval is not uniform among surgeons/centers. Few studies have assessed rates of micrometastases in pelvic versus superficial inguinal SLNs. Previous studies suggested that presence of pelvic SLNs was predicted b...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000498
更新日期:2019-02-01 00:00:00
abstract::In an attempt to define the role of plasminogen activator in invasiveness and differentiation of human melanoma cells, the modulation of these parameters was studied in two melanoma clones characterized by marked differences in their basal features, using 12-O-tetradecanoyl-phorbol-13-acetate (TPA) and retinoic acid, ...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199408000-00007
更新日期:1994-08-01 00:00:00
abstract:BACKGROUND:Melanoma is the leading cause of death from skin cancers and its etiology is complex. Recent discoveries related to genetic risk factors are helping us to understand melanoma pathogenesis better. Nuclear factor-κB (NF-κB) has a critical role in immunity, inflammation, and tumor growth. The 94ins/del ATTG (rs...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000267
更新日期:2016-08-01 00:00:00
abstract::Superantigens like the Staphylococcus enterotoxin A (SEA) can direct cytotoxic T lymphocytes expressing certain T cell receptor V beta regions to lyse MHC class II-positive target cells. This superantigen-dependent cellular cytotoxicity (SDCC) has been extended to MHC class II-negative tumour cells by targeting T cell...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199706000-00005
更新日期:1997-06-01 00:00:00
abstract::Many melanoma epitopes are presented to cytotoxic T-lymphocytes (CTLs) by major histocompatibility complex (MHC) class I molecules, and it is reasonable to expect that the epitopes would be good substrates for the transporter associated with antigen processing (TAP), as TAP plays a major role in the transport of pepti...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199808000-00008
更新日期:1998-08-01 00:00:00
abstract::Lymphoscintigraphy (LS) has been performed for 8 years in patients of the Sydney Melanoma Unit, to define lymphatic drainage patterns. Over the past 2 years, LS has also been used to locate the sentinel lymph node prior to surgery. Our technique for LS and subsequent sentinel node biopsy has an accuracy of 97%. All se...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-199412000-00009
更新日期:1994-12-01 00:00:00
abstract::The CXCR4 chemokine receptor plays an essential role in the homing of cells to organs expressing its ligand, CXCL12. CXCR4 expressed on tumor cells might regulate their traffic during metastasis. Here, we investigated whether the activation of CXCR4 on B16 murine melanoma cells regulates biological functions associate...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000346
更新日期:2017-08-01 00:00:00
abstract::Single-agent anti-PD1 antibodies are usually very well tolerated, but serious toxicity can still occur. Despite the PD-1 pathway seems to be relevant in the pathogenesis of immune-related myositis, anti-PD1-related myositis is generally a rare side effect of the treatment and usually not serious. However, its frequenc...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/CMR.0000000000000706
更新日期:2021-02-01 00:00:00
abstract::The cholesterol-lowering medications, statins, inhibit cellular proliferation and induce apoptosis in an array of cancer cell lines, including melanoma. We investigated the apoptotic mechanism of lovastatin on human melanoma cell lines in vitro. The cytotoxicity of statins on multiple cell lines was examined by Cell T...
journal_title:Melanoma research
pub_type: 杂志文章
doi:10.1097/00008390-200504000-00001
更新日期:2005-04-01 00:00:00