Abstract：
:In this study, the role of parity in conferring protection of the mammary gland against chemical carcinogenesis induced by 7,12-dimethylbenz(a)anthracene (DMBA) was investigated. Experiments were also carried out to determine if an 'interrupted' pregnancy was capable of reducing the incidence of mammary tumour induction. Since it has been suggested that morphological development or the proliferative pattern of the mammary gland at the time of carcinogen administration may be involved in reducing the susceptibility of the mammary gland to chemical carcinogenesis, experiments were designed to elucidate the possible influence of these two factors. Sprague-Dawley female rats were mated and were either allowed to complete pregnancy and parturition or were subjected to Caesarian section on day 5, 10 or 15 of the pregnancy. When DMBA was administered i.v. to animals which had been allowed to complete a full-term pregnancy, only 14% developed tumours, compared to 70% in age-matched nulliparous controls. Termination of the pregnancy on days 5, 10 or 15 was as effective in reducing tumour incidence as full-term gestation and parturition, but still resulted in partial and statistically significant inhibition, compared to age-matched nulliparous controls. There was no significant difference in 3H-thymidine labelling index (LI) at the time of DMBA treatment in the parous rats compared to age-matched nulliparous controls. We also observed no significant differences in the morphological development of the mammary gland in parous and nulliparous rats of the same age. These results indicate that the protective mechanism may not lie in the mammary gland per se, but may indeed be a host factor, such as hormonal or immunological changes occurring in the host as a result of the pregnancy.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Sinha DK,Pazik JE,Dao TLdoi
10.1038/bjc.1988.88subject
Has Abstractpub_date
1988-04-01 00:00:00pages
390-4issue
4eissn
0007-0920issn
1532-1827journal_volume
57pub_type
杂志文章abstract：BACKGROUND:There is emerging evidence to suggest that the association between socioeconomic circumstances and colorectal cancer incidence has changed over recent decades. METHODS:We conducted a descriptive population-based study to describe the relationship between socioeconomic circumstances and the incidence of colo...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2011.149
更新日期：2011-05-24 00:00:00
abstract：BACKGROUND:Hypoxia can activate autophagy, a self-digest adaptive process that maintains cell turnover. Mammalian target of rapamycin (mTOR) inhibitors are used to treat cancer but also stimulate autophagy. METHODS:Human mammary cancer cells and derived xenografts were used to examine whether hypoxia could exacerbate ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2013.644
更新日期：2013-11-12 00:00:00
abstract：:Two subtypes of thrombospondin (TSP-1 and TSP-2) have inhibitory roles in angiogenesis in vitro, although the biological significance of these TSP isoforms has not been determined in vivo. We examined TSP-1 and TSP-2 gene expression by reverse transcription polymerase chain reaction (RT-PCR) analysis in 61 colon cance...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6690056
更新日期：1999-01-01 00:00:00
abstract：:A bispecific monoclonal antibody recognising both carcinoembryonic antigen (CEA) and ricin toxin A chain (RTA) was tested for its ability to target recombinant RTA (r-RTA) to CEA-expressing tumour cells, alone and in combination with ricin B chain (RTB). The antibody, 636 (Robins et al., 1990), induced significant RTA...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1991.153
更新日期：1991-05-01 00:00:00
abstract：BACKGROUND:Current evidence indicates that a stem cell-like sub-population within malignant glioblastomas, that overexpress members of the adenosine triphosphate-binding cassette (ABC) family transporters, is responsible for multidrug resistance and tumour relapse. Eradication of the brain tumour stem cell (BTSC) compa...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2013.188
更新日期：2013-05-28 00:00:00
abstract：BACKGROUND:The recently described navigator proteins have a multifaceted role in cytoskeletal dynamics. We report here on the relevance of one of them, navigator 3 (NAV3), in colorectal cancer (CRC). METHODS:We analysed changes in chromosome 12 and NAV3 copy number in CRC/adenoma samples of 59 patients and in 6 CRC ce...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2011.553
更新日期：2012-01-31 00:00:00
abstract：:The level of Gross cell-surface antigen (GCSAa) expression at the surface of murine retrovirus-infected fibroblasts was determined by quantitative absorption of the anti-GCSAa activity of a serum produced in syngeneic W/Fu rats immunized against (C58NT)D lymphoma, and tested in a cytotoxicity assay against E male G2 l...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1981.97
更新日期：1981-05-01 00:00:00
abstract：:We investigated trends in first-time hospital admissions and deaths attributable to hepatocellular carcinoma (HCC) in a large population-based cohort of 22 073 individuals diagnosed with hepatitis C viral (HCV) infection through laboratory testing in Scotland in 1991-2006. We identified new cases of HCC through record...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6604563
更新日期：2008-09-02 00:00:00
abstract：:A brief review is presented of the evidence linking the development of certain types of neoplasms, and of the malignant lymphomas in particular, to chronic immunosuppression in animals and man and to the naturally occurring human immunologic deficiency states. The discussion then focuses on Hodgkin's disease and consi...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/bjc.1971.78
更新日期：1971-12-01 00:00:00
abstract：:In premenopausal women with advanced breast cancer the luteinising hormone-releasing hormone agonist goserelin (Zoladex, ICI plc) will produce serum levels of oestradiol equivalent to those following surgical oophorectomy or the menopause. This paper reports our further experience of using this drug in 75 premenopausa...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1990.397
更新日期：1990-11-01 00:00:00
abstract：:Fibroblast growth factor receptor 3 (FGFR3) is one of four high-affinity tyrosine kinase receptors for the FGF family of ligands, frequently associated with growth arrest and induction of differentiation. The extracellular immunoglobulin (IgG)-like domains II and III are responsible for ligand binding; alternative usa...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6601249
更新日期：2003-10-06 00:00:00
abstract：BACKGROUND:Doxorubicin and cyclophosphamide (AC) therapy is an effective treatment for early-stage breast cancer. Doxorubicin is a substrate for ABCB1 and SLC22A16 transporters. Cyclophosphamide is a prodrug that requires oxidation to 4-hydroxycyclophosphamide, which yields a cytotoxic alkylating agent. The initial oxi...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6605587
更新日期：2010-03-16 00:00:00
abstract：:We have analysed DNA extracted from the serum and peritoneal fluid of 20 ovarian cancer patients for the presence of tumour-specific genetic alterations. The 20 patients included six with stage Ia disease. Using six polymorphic microsatellite loci we were able to detect novel alleles or loss of heterozygosity in 17/20...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6690601
更新日期：1999-08-01 00:00:00
abstract：:A prospective, consecutive study of the aetiology of treatment-associated diarrhoea was conducted in 25 patients with disseminated germ cell cancer treated with intensive chemotherapy. Clostridium difficile was isolated in 45% of the diarrhoea episodes, which makes this species the most important bacterial pathogen in...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1992.334
更新日期：1992-10-01 00:00:00
abstract：:The antiapoptotic Livin/ML-IAP gene has recently gained much attention as a potential new target for cancer therapy. Reports indicating that livin is expressed almost exclusively in tumours, but not in the corresponding normal tissue, suggested that the targeted inhibition of livin may present a novel tumour-specific ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6604028
更新日期：2007-11-05 00:00:00
abstract：:The clearance of an intradermally-injected solution of 133Xenon in 0.9% saline has been used to study the impairment and recovery of blood flow in mouse tail for 5 days following photodynamic therapy (PDT) with 2mg TPPS i.v. per mouse and a range of doses of white light. Impairment of blood flow was observed within 10...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1988.105
更新日期：1988-05-01 00:00:00
abstract：BACKGROUND:Determining the rate of breast cancer (BC) growth in vivo, which can predict prognosis, has remained elusive despite its relevance for treatment, screening recommendations and medicolegal practice. We developed a model that predicts the rate of in vivo tumour growth using a unique study cohort of BC patients...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章
doi：10.1038/s41416-019-0539-x
更新日期：2019-09-01 00:00:00
abstract：BACKGROUND:Tissue micro-arrays (TMAs) are increasingly used to generate data of the molecular phenotype of tumours in clinical epidemiology studies, such as studies of disease prognosis. However, TMA data are particularly prone to missingness. A variety of methods to deal with missing data are available. However, the v...
journal_title：British journal of cancer
pub_type： 杂志文章,meta分析
doi：10.1038/sj.bjc.6606078
更新日期：2011-02-15 00:00:00
abstract：:Previous studies have demonstrated that BR-931, a hepatic peroxisome proliferator, can induce liver tumours in mice and rats. Since alterations in gene expression may play a critical role in multistage hepatocarcinogenesis, the present studies examined the expression of the c-myc, c-H-ras, epidermal growth factor (EGF...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1991.406
更新日期：1991-11-01 00:00:00
abstract：:Initial studies revealed that proline-directed protein kinase F(A) (PDPK F(A)) was overexpressed in various cancerous tissues relative to normal controls. However, the functional role of overexpressed PDPK F(A) in cancer remains to be established. In this report, we explore the potential role of PDPK F(A) in leukaemia...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1054/bjoc.1999.1133
更新日期：2000-04-01 00:00:00
abstract：:Information on exposure and reaction to sunlight, together with the history of exposure to fluorescent lighting, was elicited by postal questionnaire. Case-control analysis from 58 patients with malignant melanoma, 182 matched controls and 151 unmatched controls showed associations between malignant melanoma and (i) b...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1985.255
更新日期：1985-11-01 00:00:00
abstract：:BALB/c mice born to and nursed by females immunized against MSV-M showed a reduced tumour incidence and a high tumour regression rate following MSV-M injection at 7-14 days of age. Females immunized long before mating could also confer protection to their offspring whereas females immunized after parturition could not...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1973.143
更新日期：1973-09-01 00:00:00
abstract：BACKGROUND:Accumulating evidence demonstrates high levels of aldehyde dehydrogense (ALDH) activity in human cancer types, in part, because of its association with cancer stem cells. Whereas ALDH1A1 and ALDH7A1 isoforms were reported to associate with prostate tumorigenesis, whether other ALDH isoforms are associated wi...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2014.201
更新日期：2014-05-13 00:00:00
abstract：:Cytochrome P450 3A is a drug-metabolising enzyme activity due to CYP3A4 and CYP3A5 gene products, that is involved in the inactivation of anticancer drugs. This study analyses the potential of cytochrome P450 3A enzyme in human colorectal cancer to impact anticancer therapy with drugs that are cytochrome P450 3A subst...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6600494
更新日期：2002-09-09 00:00:00
abstract：BACKGROUND:Melatonin induces apoptosis in many different cancer cell lines, including hepatocellular carcinoma cells. However, the responsible pathways have not been clearly elucidated. A member of the forkhead transcription factors' family, FoxO3a, has been implicated in the expression of the proapoptotic protein Bim ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2012.563
更新日期：2013-02-05 00:00:00
abstract：:To assist in the description of the cellular heterogeneity present in normal and neoplastic urothelium, a panel of monoclonal antibodies (MoAbs) was raised against human transitional cell carcinoma (TCC) of the urinary bladder. All immunizations were carried out using whole cells and membrane preparations from well di...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1987.220
更新日期：1987-10-01 00:00:00
abstract：:Classification of lymphoid malignancy has changed markedly in recent years and advances have been made in therapy. This study investigated the variations in treatment and survival of 1622 patients in a population-based registry. A total of 1009 cases of malignant lymphoma (ML) were classified according to the Kiel cla...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1995.406
更新日期：1995-09-01 00:00:00
abstract：:Epidemiologic evidence has recently identified an association between an endemic outbreak of pleural and peritoneal mesothelioma in the Urgup region of Turkey and exposure to zeolite fibres. This malignancy is usually associated with exposure to asbestos dusts whose mineralogical characteristics differ from those of z...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1986.158
更新日期：1986-07-01 00:00:00
abstract：BACKGROUND:This multicentre, open-label study evaluated the efficacy and safety of SPI-1620, an analogue of endothelin-1, administered in combination with docetaxel as second-line treatment for patients with advanced biliary tract cancer (ABTC). METHODS:Eligible patients received continuous cycles of combination thera...
journal_title：British journal of cancer
pub_type： 杂志文章,多中心研究
doi：10.1038/bjc.2017.160
更新日期：2017-07-11 00:00:00
abstract：BACKGROUND:Combined oral contraceptive (COC) use reduces epithelial ovarian cancer (EOC) risk. However, little is known about risk with COC use before the first full-term pregnancy (FFTP). METHODS:This Canadian population-based case-control study (2001-2012) included 854 invasive cases/2139 controls aged ⩾40 years who...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2016.400
更新日期：2017-01-17 00:00:00
