Abstract:
:The role of L-tyrosine, L-phenylalanine, L-dihydroxyphenylalanine (dopa) and L-tryptophan in melanin biosynthesis in melanotic hamster melanoma IC-Sofia was investigated with the aid of 14C-aminoacids. Tyrosine and phenylalanine were found to be the main melanin precursors: about 64.5% of total melanin labeling was due to tyrosine incorporation and 27.4% to phenylalanine incorporation. Negligible proportions of melanin radioactivity (5.7% and 2.4%, respectively) resulted from dopa and tryptophan utilization in melanin synthesis. The involvement of each of the aminoacids under investigation in melanin synthesis in vivo is discussed.
journal_name
J Cancer Res Clin Oncoljournal_title
Journal of cancer research and clinical oncologyauthors
Blagoeva PMdoi
10.1007/BF00390476subject
Has Abstractpub_date
1984-01-01 00:00:00pages
366-8issue
3eissn
0171-5216issn
1432-1335journal_volume
108pub_type
杂志文章abstract:OBJECTIVES:Solitary plasmacytoma (SP) is characterized by a single mass of clonal plasma cells. Definitive RT can result in long-term local control of the SP. Due to the small number of patients and narrow range of doses, phase III randomized trials are lacking. The aim of this study is to further support the potential...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-020-03452-y
更新日期:2020-11-17 00:00:00
abstract::The regulatory influence of medroxyprogesterone acetate (MPA) on estrogen and androgen receptors of the human breast cancer cell lines MCF-7 and EFM-19 was explored in conjunction with the growth-promoting properties of these steroids. In the absence of steroidal stimulation, up to 1 microM MPA had no effect on the pr...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01613000
更新日期:1990-01-01 00:00:00
abstract:PURPOSE:To identify crucial molecular alterations of receptor tyrosine kinases that can be used as potential therapeutic targets for eyelid sebaceous gland carcinoma (SbGC). METHODS:The expression levels of HER2, EGFR, C-MET, and FGFR1 were determined by immunohistochemistry (IHC). The copy numbers of the HER2, EGFR, ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-015-2009-z
更新日期:2016-01-01 00:00:00
abstract::Treatment of cultured mammalian cells with hydrogen peroxide results in the production of extensive DNA damage. Strand breakage was produced at the level of either nascent or mature DNA and the former target appeared slightly more resistant than the latter. Although inhibitors of the enzyme poly(ADP-ribose) polymerase...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01211801
更新日期:1992-01-01 00:00:00
abstract::The arabinofuranosylcytosine (AraC) derivative N4-octadecyl-1-beta-D-arabinofuranosylcytosine (NOAC) and its (5'-->5')-heterodinucleoside phosphate analog NOAC-AraC were compared with AraC for cytotoxicity, cell-cycle dependence, phosphorylation by deoxycytidine (dC) kinase and apoptosis induction in native, AraC- or ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320050349
更新日期:2000-06-01 00:00:00
abstract::Correlations between exposure to vinyl chloride and the development of malignant tumors in the liver have been know since 1974 and have been confirmed by many an experimental investigation. Based on the evaluation of mortality statistics from nine different countries an increased incidence of malignant tumors of the l...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00410529
更新日期:1981-01-01 00:00:00
abstract::The Harvey ras locus was examined for restriction fragment polymorphism and loss of allelic heterozygosity in 62 oral cancer patients. Southern blot analysis on BamHI digests of the tumour tissue DNA, revealed 23 patients with H-ras-1 heterozygosity. The probes used to study the polymorphism were the BamHI 6.6-kb frag...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01612771
更新日期:1991-01-01 00:00:00
abstract::The subsets and functions of lymphocytes were investigated in patients with nasopharyngeal carcinoma (NPC). The patients were divided into two groups comprising tumor-bearing patients and those in remission. There was no difference in the proportion of T cells among tumor-bearing, remission and healthy control groups....
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01200735
更新日期:1993-01-01 00:00:00
abstract:AIMS:With three consecutive tetratricopeptide repeat (TPR) motifs at its C-terminus essential for neuronal migration, and a p23 domain at its N-terminus, DYX1C1 was the first gene proposed to have a role in developmental dyslexia. In this study, we attempted to identify the potential interaction of DYX1C1 and heat shoc...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-009-0568-6
更新日期:2009-09-01 00:00:00
abstract:PURPOSE:Explore patient-reported outcomes (PROs), including health-related quality of life (HRQoL), satisfaction with therapy, impact of the therapy on work and daily life, and concerns related to the therapy and identify variables associated with PROs in persons with chronic myeloid leukemia (CML) receiving tyrosine k...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-017-2353-2
更新日期:2017-06-01 00:00:00
abstract::The responsiveness of spleen cells from C57BL/6J mice to various immunogenic stimuli was examined during the progressive growth of a poorly immunogenic fibrosarcoma T241. A strong correlation was observed between the progressive tumor growth and the depression of response to Concanavalin A, lipopolysaccharide, sheep r...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00410112
更新日期:1981-01-01 00:00:00
abstract:PURPOSE:Prostate cancer is one of the leading causes of cancer death for male. In the present study, we applied an integrated bioinformatics approach to provide a novel perspective and identified some hub genes of prostate cancer. METHOD:Microarray data of fifty-nine prostate cancer were downloaded from Gene Expressio...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-017-2497-0
更新日期:2017-12-01 00:00:00
abstract:OBJECTIVE:To examine the associations between modifiable health-related factors, such as smoking, low physical activity and higher body mass index (BMI), and annual health care visits and expenditures among adult cancer survivors in the United States. METHODS:Using data from the 2010-2014 Medical Expenditures Panel Su...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-017-2494-3
更新日期:2017-12-01 00:00:00
abstract:PURPOSE:Little data exist on characteristics, treatment, and outcome of patients with bone metastases from germ cell cancer. METHODS:A total of 434 patients with poor prognosis germ cell cancer, who underwent primary high-dose chemotherapy (HD-CTX) within two phase II trials, were retrospectively analyzed. RESULTS:40...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00432-012-1169-3
更新日期:2012-06-01 00:00:00
abstract::In view of the great variation in the size of epithelial cell nuclei in benign changes in the mammary gland, the cytologist is often faced with diagnostic difficulties. Clear differences in the size of the nuclei in aspiration biopsies from the mammary glands of pregnant women and those from the mammary glands of post...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00390363
更新日期:1985-01-01 00:00:00
abstract::The precise place of local estrogen production in mammary cancer is still controversial. In this investigation localization of aromatase (the key enzyme of estrogen biosynthesis) was studied in breast cancer tissue by immunohistochemical method using polyclonal rabbit antibodies. The cytoplasmic staining was found in ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF01187162
更新日期:1996-01-01 00:00:00
abstract:PURPOSE:The molecular mechanisms underlying the development of intestinal metaplasia (IM) of the human stomach have yet to be clarified in detail. Besides ectopic expression of intestinal transcription factors, Cdx1 and Cdx2, little information is available regarding other regulatory factors. Hence, we here analyzed So...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-003-0519-6
更新日期:2004-03-01 00:00:00
abstract:PURPOSE:This study aimed to determine the dose effect of smoking on the mutational frequency and spectrum of epidermal growth factor receptor (EGFR) gene in Korean non-small cell lung cancer (NSCLC). METHODS:Detailed smoking histories were obtained from 324 consecutively enrolled Korean NSCLC patients. Mutational stat...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-010-0853-4
更新日期:2010-12-01 00:00:00
abstract::The role of DNA adducts in the initiation of cancer is scrutinized in this presentation. Work on the activation of oncogenes, particularly on ras, has provided new evidence to link DNA adducts and tumour formation. Polycyclic hydrocarbons and nitroso compounds can cause activation of ras oncogenes through a defined po...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章,评审
doi:10.1007/BF00395910
更新日期:1986-01-01 00:00:00
abstract::Antinucleolar antisera were raised in rabbits, goats and sheep to nucleoli isolated from three human tumor cell lines. The antisera were shown to cross-react by immunofluorescence with human tumor cell lines originating from different organs and with frozen sections from a wide variety of human malignant and non-malig...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00400962
更新日期:1989-01-01 00:00:00
abstract:OBJECTIVES:Evidence from multiple clinical trials showed that local consolidative therapy (LCT) improved survival in oligometastatic non-small cell lung cancer (NSCLC) patients. In the present study, we aim to explore the potential role of microwave ablation (MWA) as LCT for epidermal growth factor receptor (EGFR)-muta...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-019-03043-6
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:The clinical behaviour and outcome of young patients with gastroesophageal tumours (GET) is surmised to differ from older patients, yet data on the comparison of these two patient subgroups is scarce. This study focuses on the investigation of the clinical characteristics and survival outcome of younger-age ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-020-03302-x
更新日期:2020-12-01 00:00:00
abstract::Tissue sections of frozen biopsy specimens obtained from normal and hyperplastic human lymphoid tissues as well as 40 cases of non-Hodgkin's lymphomas were analysed in immunofluorescence tests (using red TRITC and green FITC double-labeling). A panel of antisera including well-characterized conventional reagents to im...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00405058
更新日期:1981-01-01 00:00:00
abstract:PURPOSE:The gold standard of axillary sentinel lymph node biopsy (SLNB) in breast cancer is the combination of radioactive colloid and blue dye injection. Worldwide, numerous hospitals without access to radioactive tracers still perform a routine complete axillary lymph node dissection (ALND). We retrospectively analyz...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-007-0333-7
更新日期:2008-06-01 00:00:00
abstract::Elevated glutamate concentrations are commonly observed in tumor patients, and glutamate was recently found to competitively inhibit the membrane transport of cystine. We therefore investigated the possibility that elevated plasma glutamate levels may damage the immune system. The experiments in this report demonstrat...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/BF00417824
更新日期:1988-01-01 00:00:00
abstract:PURPOSE:Pregnancies in women with essential thrombocythemia (ET) are at a higher risk for obstetrical complications. Acetylsalicylic acid (ASA) and low-molecular weight heparin (LMWH) are common options to prevent miscarriages and maternal complications, whereas interferon alpha (IFN) seems to be the cytoreductive ther...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-020-03430-4
更新日期:2020-11-02 00:00:00
abstract:INTRODUCTION:Non-adherence to anti-hormonal therapy is a major problem in gynecologic oncology. Reasons reported are side effects and lack of support. The aim of our study was an analysis of influence of experiences of patients with endocrine therapy and communication and information on this topic and their influence o...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-014-1779-z
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVES:Due to PSA screening and increased awareness, prostate cancer (PCa) is identified earlier resulting in smaller diagnostic samples on prostate needle biopsy. Because Gleason grading plays a critical role in treatment planning, we undertook a controlled study to evaluate interobserver variability among German ...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-008-0388-0
更新日期:2008-10-01 00:00:00
abstract:PURPOSE:Cancer-associated fibroblasts (CAFs) contribute to tumor progression through multiple pathways. However, the effect of CAFs on gene expression in lung cancer has been largely unknown. Here we systematically compared the gene expression changes in lung cancer cells induced by normal fibroblasts and CAFs. METHOD...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s00432-012-1328-6
更新日期:2013-03-01 00:00:00
abstract::The aim of the present studies was to elucidate the effects and optimal modulatory conditions of 5-ethyl-2'-deoxyuridine (EtdUrd) on the antitumour efficacy, pharmacokinetics and catabolism of 5-fluorouracil (5-FU) on Colon-26 and Colon-38 murine tumours. HPLC and GC-MS techniques were used to measure the concentratio...
journal_title:Journal of cancer research and clinical oncology
pub_type: 杂志文章
doi:10.1007/s004320050333
更新日期:1999-12-01 00:00:00